Begs eng

S1010 C. 1.05×103 D.1.05×109 E. 1.05×104

1. The scientific notation 8.2×10-4 + 5.4×10-4=………
   A.1.35×10-5 B. 1.36×10-4 C.1.36×10-3 D.1.36×10-7 E.1.36×103
2. Which of the following is (are) true?
   A.log(xy) =logx + logy B. logxn = n logx C. log101=0
   D.logxx=1 E.logxy= logx-logy
3. Which of the following is (are) true?
   1.logMlogN=logM-logN 2.log3M=3logM 3.logaM =2logaM
   A. 1 only B. 2 only C. 3 only D. 1 and only E. None of them
   6.Which of the following is (are) true?
   1. log4x=2log16x 2. logbx=3 logb3x 3. log416= log164
      A. 1only B. 2 only C. 3 only D. 1 and 2 only E. 1 and 3 only
4. 101+log103=……..
   A.3 B.30 C. 310 D.103 E.15
   8.4log23=……..
   A.3 B.-6 C.9 D.12 E.15
5. log35× log2527=………….
   A.32 B.23 C.527 D.325 E. 5×27
   10.If x=logba,y=logcb,z=logac, then xyz=…………
   A. 0 B. 1 C.-1 D. abc E. a+b+c
6. If log2=a, then =…….
   A.a2 B.2.5a C.1+a D.1-a E.12a
   12.If log2=a, log3=b, then log144=………….
   A. a4b2 B.4a+2b C.8ab D. a2b2 E. None of them
7. 3+log25=……..
   A.log240 B.log24 C.log2150 D. log215 E.log260
8. log0.01=………
   A. 2 B. -2 C.12 D.-12 E.0
9. log240+log20.1+log20.25=……….
   A. 0 B. 1 C.2 D. 3 E.4
10. log222=………
    A. 23 B.1 C.112 D.-32 E.-23