<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[RSS Feed]]></title><description><![CDATA[RSS Feed]]></description><link>https://ecency.com</link><image><url>https://ecency.com/logo512.png</url><title>RSS Feed</title><link>https://ecency.com</link></image><generator>RSS for Node</generator><lastBuildDate>Fri, 07 Aug 2026 08:23:09 GMT</lastBuildDate><atom:link href="https://ecency.com/@masterwu/rss" rel="self" type="application/rss+xml"/><item><title><![CDATA[[DTube] Integral of ∫sin(2x)cos(5x)dx with Product to Sum Formula]]></title><description><![CDATA[In this video, we work through the integral of ∫sin(2x)cos(5x)dx. The first step when performing any integral is to see if we can simplify the integrand, which in this case is: sin(2x)cos(5x) Luckily,]]></description><link>https://ecency.com/@masterwu/1qea0p3x</link><guid isPermaLink="true">https://ecency.com/@masterwu/1qea0p3x</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Wed, 30 Jan 2019 05:57:54 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCM8sg7HMKovn2Hrh8zTiE2Sbbgzo5y8Bb2144Br5mCNnU9vz7PVSsGAdnN72ZZ?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Proof the derivative of sin(x) = cos(x) by First Principles]]></title><description><![CDATA[In this video, we prove that the derivative of sin(x) equals cos(x) by the very definition of the derivative, which is: df/dx = f'(x) = lim_(h approaches 0) f(x + h) - f(x) / h Thus: d/dx [sin(x)] = lim_(h]]></description><link>https://ecency.com/@masterwu/suurvcud</link><guid isPermaLink="true">https://ecency.com/@masterwu/suurvcud</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Mon, 28 Jan 2019 13:54:06 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCM8bv7L1fmEbASy28XLYufuMw5oja1cKvPjahsbxwSWqH8b28jGcnfeGxJNEQv?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Reduction Formula for Integral of ∫ln^n(x)dx]]></title><description><![CDATA[In this video, we work through the derivation of the reduction formula for the integral of lnn(x) or [ln(x)]n. Like with lower powers of ln(x), such as ln2(x), we adopt the same approach of integration]]></description><link>https://ecency.com/@masterwu/afty4del</link><guid isPermaLink="true">https://ecency.com/@masterwu/afty4del</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Sat, 26 Jan 2019 02:52:45 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCMCp2ke3pjAuNW6ixKvfz3zJUj1pYy5Gy8zvp8bxHdG5MVE4tJ1mHBgiaDB5KE?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Limit of sin(x)/x as x approaches 0: Geometric Proof]]></title><description><![CDATA[In this video, we work through a geometric proof for the limit of sin(x)/x as x approaches 0. You may have visually inspected and tabulated that sin(x)/x does indeed approach L = 1 when x = 0, although]]></description><link>https://ecency.com/@masterwu/94dt8cit</link><guid isPermaLink="true">https://ecency.com/@masterwu/94dt8cit</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Sat, 26 Jan 2019 01:04:27 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCM7Z9GtNEgjbpi6fjaaR241rVKnvfe4psAg5NL3N4AkGZh4QyCUgZjBrQ1fEh7?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Example Problem Solving Exercises for Geometric Series]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. In this video, I take you through 3 worked solutions of text book problems involving]]></description><link>https://ecency.com/@masterwu/18umurtv</link><guid isPermaLink="true">https://ecency.com/@masterwu/18umurtv</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Thu, 24 Jan 2019 13:50:57 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCMA9W7fzp9PitMEjkPUbXhp3WxSViJcndb3W8gy4Qspw6zkfrMubTZ5dM8jyvJ?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Reduction Formula for Integral of ∫sin^n(x)dx]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. In this video, we work through the derivation of the reduction formula for the integral]]></description><link>https://ecency.com/@masterwu/lnpp2ich</link><guid isPermaLink="true">https://ecency.com/@masterwu/lnpp2ich</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Tue, 22 Jan 2019 08:03:36 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCMDmwbnFnqXVMxDF7LDP6myyEE3PjuGz4icy2BPBBmvaAHTLLMj2YCfkyQcqHr?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Modelling Population Growth with the Logistic Model: IVP]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. In this video, we use our knowledge of the logistic model for population growth to]]></description><link>https://ecency.com/@masterwu/g5lqn62d</link><guid isPermaLink="true">https://ecency.com/@masterwu/g5lqn62d</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Tue, 22 Jan 2019 07:43:54 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCM6wH4o2CcjuHA3nuV3LZoxPjCcDA3AHfkMbfmTm4wmhwq7warkkuYkLWcyFJt?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Integral of ∫dx/sqrt(1-x^2)]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. In this video, we work through the steps to find the indefinite integral or]]></description><link>https://ecency.com/@masterwu/9ci47rqp</link><guid isPermaLink="true">https://ecency.com/@masterwu/9ci47rqp</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Tue, 15 Jan 2019 06:04:48 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCM9DM26HwnKVhaRRKpmBxRpiXMdNYnjCBEaQYDsThtxaSJiYnRh57qxzQHqeVm?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Geometric Series: Deriving the Summation Formulas]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain In this video, we derive the formulas for summing a geometric series, firstly to the]]></description><link>https://ecency.com/@masterwu/ix2ynwwi</link><guid isPermaLink="true">https://ecency.com/@masterwu/ix2ynwwi</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Mon, 14 Jan 2019 22:30:15 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCMD8kQHxqsgjwXQpkymaHCK8cHK8JxPAtDpU1NHQfSJTLpb8vknUJDCnWdvsX8?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Modelling Price Inflation with Geometric Sequences]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. You may have noticed that prices of goods and services, such as a cup of coffee gradually]]></description><link>https://ecency.com/@masterwu/gvrpeycl</link><guid isPermaLink="true">https://ecency.com/@masterwu/gvrpeycl</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Fri, 11 Jan 2019 05:47:48 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCMDnm18GisXdPTXuxVBXPns3WNj85Yiyh2P8ttA3NbBXt8Z5Lsh5kNPppVXMX8?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] What are Geometric Sequences?]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. In this video, I introduce the concept of geometric sequences. Let's take for example]]></description><link>https://ecency.com/@masterwu/350owd72</link><guid isPermaLink="true">https://ecency.com/@masterwu/350owd72</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Wed, 09 Jan 2019 01:33:03 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCMADmyFRCqCU1L9B4uT7ghxvFyS6ugqRs1XZCZrVdMi8YpTZMvjHgpw1X8UQ4b?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] The Logistic Differential Equation for Population Growth: General Solution]]></title><description><![CDATA[In this video, we work through the process for deriving the analytical solution to the Logistic Equation formulated by Verhulst for modelling population growth. We first compare the natural (exponential)]]></description><link>https://ecency.com/@masterwu/fkxwpmiz</link><guid isPermaLink="true">https://ecency.com/@masterwu/fkxwpmiz</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Tue, 08 Jan 2019 05:38:45 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCM7ZpPsE1nZZ7Qirnj3S7CJ4UHWpic87qQgeZjAkRohHUbbB8Yq1J486pcRreC?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Geometric Sequences: The Geometric Mean]]></title><description><![CDATA[In this video, we take looking into the Geometric Mean, which is simply the middle term of 2 successive terms of a Geometric Sequence. We derive the formula for expressing the geometric mean: t_n^2 = t_(n-1)]]></description><link>https://ecency.com/@masterwu/paqqafsx</link><guid isPermaLink="true">https://ecency.com/@masterwu/paqqafsx</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Sat, 29 Dec 2018 10:27:30 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCM8rVtB12HKP7UjfScsrinPweiqwpxNEAAeQgHag5MYe5bZep4GRGsywnLQh2c?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Geometric Sequences: Find the first term and common ratio]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. In this video, we use the general equation for terms of a geometric sequence: tn =]]></description><link>https://ecency.com/@masterwu/of5yei05</link><guid isPermaLink="true">https://ecency.com/@masterwu/of5yei05</guid><category><![CDATA[dtube]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Sun, 23 Dec 2018 01:03:57 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCM9B8zYLf71Uvu9tC9DwPd4Gimx3hUUM1msGAe1YFk7ALYXpeQoLPDci8kToJy?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Geometric Sequences: Find the 4th term given the 7th term]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. In this video, we use the general equation for terms of a geometric sequence: tn =]]></description><link>https://ecency.com/@masterwu/cokj5wzv</link><guid isPermaLink="true">https://ecency.com/@masterwu/cokj5wzv</guid><category><![CDATA[steemstem]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Thu, 20 Dec 2018 02:10:54 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCM8FDX16r77aoDwKkjjwRK5NF5L24b65VfbJQ98CsACNyvK331HD2X4Ds4rLmh?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Integral of ∫tan^4(x)dx using the Reduction Formula]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. In this video, we work through the process of solving the integral of ∫tan^4(x)dx]]></description><link>https://ecency.com/@masterwu/m1vct4y8</link><guid isPermaLink="true">https://ecency.com/@masterwu/m1vct4y8</guid><category><![CDATA[steemstem]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Tue, 18 Dec 2018 09:18:45 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCMDSMfYdWN9vmL9MYmsntkqpqKG4gNeBmShz4DA8BeNgDWHiZXTrcatRYbo9J8?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Lines and Planes: Vector and Dot product forms: Linear Algebra]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. In this video, we work through exam style questions on vectors, lines and plains.]]></description><link>https://ecency.com/@masterwu/9z14q7ud</link><guid isPermaLink="true">https://ecency.com/@masterwu/9z14q7ud</guid><category><![CDATA[steemstem]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Mon, 17 Dec 2018 05:00:06 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCM9FZF8te7ZkpW9kqMt6URfXLU8LNvgLL7hf68WSciACBHXseaoaUwRNGW7aPw?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Newton's Law of Cooling - First Order Differential Equations]]></title><description><![CDATA[In this video, we derive Newton's Law of Cooling and use it to determine how fast a bottle of water cools when it is placed inside of a refrigerator. We are given that the bottle of water is a room temperature]]></description><link>https://ecency.com/@masterwu/b0xyh50u</link><guid isPermaLink="true">https://ecency.com/@masterwu/b0xyh50u</guid><category><![CDATA[steemstem]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Fri, 14 Dec 2018 06:14:00 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCM8caRva7d36usHeMoqBtyCn5FUWqgWaDhdCPGwU7pH3uFgWms2Dmf9thjqXd4?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Linear systems - 3 Intersecting Planes - No unique solutions]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. In this video, we solve a linear system of equations for 3 planes: 5x + 2y + 11z =]]></description><link>https://ecency.com/@masterwu/lbeqxvw1</link><guid isPermaLink="true">https://ecency.com/@masterwu/lbeqxvw1</guid><category><![CDATA[steemstem]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Thu, 13 Dec 2018 06:11:42 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCMD98Y35XKmgYWgJxPAUizzjnojSHPKxa4c3aw47KoxE7UkkkJpqnU1dz6Cn72?format=match&amp;mode=fit" length="0" type="false"/></item><item><title><![CDATA[[DTube] Mixing Salt and Water - First Order Differential Equations]]></title><description><![CDATA[I'm in the process of uploading all of my Youtube videos to DTube, where they can be recorded on the Steem blockchain. My 200th YT Video! Thank you for your support. 6.5K subscribers and 1.7 million views]]></description><link>https://ecency.com/@masterwu/46y0bn9r</link><guid isPermaLink="true">https://ecency.com/@masterwu/46y0bn9r</guid><category><![CDATA[steemstem]]></category><dc:creator><![CDATA[masterwu]]></dc:creator><pubDate>Tue, 11 Dec 2018 07:50:24 GMT</pubDate><enclosure url="https://i.ecency.com/p/46aP2QbqUqBqwzwxM6L1P6uLNceBDDCMDRhBN8ZkyGzfzyr1xA3LKybcpc1pAmKZaFFZjk4C899L8fYP3et1D2ro2HEy?format=match&amp;mode=fit" length="0" type="false"/></item></channel></rss>