log311 C.log3 D.log11 E. 0
30.If log2=m, log3=n, then log720 =……….
A. m+n+1 B. 3m+n+1 C. 2m+3n+1 D. 3m+2n+1 E. 3m+2n-1
- log29 =a , log26=………..
A. 1a+2 B.a+22 C. -a D. a+12 E. 2a
- log0.040.4=…….
A. -3 B. -2 C. -1 D. 1 E.4
- log55+log31+log416=…….
A. 0 B. 1 C. 2 D. 3 E.4
- If log2.7 =0.431 , then log2.7 =………
A.1 .431 B.-0.215 C.0.2155 D. 0.862 E.-0.862
35.If log0.80 = 1.903 , then log0.802=…….
A. 2.806 B. 3.806 C. 2.903 D. 1.806 E. 3.903
- If log9=0.954 and log2 =0.310, then log1.8=…….
A. 0.644 B. 1.264 C. 0.264 D. 2.264 E. -0.264
37.Given log40=1.602 and log30=1.477, then log403=……..
A. 0.125 B. 1.125 C. 2.215 D. 1.125 E. None of these
38.Given that log8=0.908 , then log0.0812=………
A. 3.454 B. 2.454 C. 0.454 D. 1.454 E. 1.454
39.If x0.6=4, then log4x=…….
A. 35 B. 4 C. 53 D. -53 E.-35
- log24x-4=2, then log2x=…….
A. 2 B. -2 C. 22 D. -12 E. 4
