Q9. If logx 4 = 2, then x is equal to
Answer- Option B
Explanation-
4 = x
2
x = 2
Q10. log 360 is equal to
| A. 3log 2 + 2log 3 |
B. 3log 2 - 2log 3 + log5 |
| C. 3log 2 + 2log 3 + log5 |
D. 2log 2 + 3log 3 |
Answer- Option C
Explanation-
360 = (2x2x2)x(3x3)x5
log 360 = log (2
3x3
2x5) = log 2
3 + log 3
2 + log 5 = 3log 2 + 2log3 + log5
Q11. If log10 2 = 0.3010, the value of log10 80 is
| A. 1.9030 |
B. 1.6020 |
| C. 9.9030 |
D. 3.6020 |
Answer- Option A
Explanation-
log
10 10x8
log
10 10 + log
10 8
1 + log
10 2
3 1 + 3log
10 2
1 + 0.9030
1.9030
Q12. If a = bx, b = cy and c = az, then the value of xyz is equal to
Q13. log5 3 x log3 625 equals:
Q14. logb a x logc b x loga c is equal to:
| A. a + b + c |
B. abc |
| C. -1 |
D. 1 |
= -0.5, then x is equal to
