the smallest possible value of n(P∩Q) is
A.5 B.2 C.3 D.7 E.8
20.Which of the following is (are) true?
1. {x\x2-5x+6=0}⊂{x\2≤x≤4}
2.{x/x is an even number}∩{x\x is an odd number}
3.A∪A´=S
A.1 only B. 2 only C.3 only D . 1,2 and 3 E. None of these
21.How many subsets of A\B if A={2,3,5,8} and B={x\x3-8x+15=0}
.Which of the following statement is (are) true?
1.If m>0 , then the segment makes an actual angle with the positive direction of X-axis.
2. If m<0 , the line segment makes an obtuse angle with the positive direction of X-axis.
3. If m is either positive or negative, then the line segment is nonvertical.
A.1 only B. 2only C. 1and3 only D. 2and3 only E. 1,2 and 3
