11. If log 32 x= 0.8, then x is equal to
A.
25.6 B. 16
C. 10 D.12.8
12.
|
If ax = by
|
|
A. log a/b = x/y
|
B. log a/ log b = x/y
|
|
|
C. log a/ log b = y/x
|
D. Non
|
|
13.
|
If log10 7 = a, then log10
|
|
1
|
|
is equal to:
|
70
|
|
A.
|
- (1 + a)
|
B.
|
(1 + a)-1
|
C.
|
|
D.
|
|
|
14.
|
If
log10 2 = 0.3010, then log2 10 is equal to:
|
|
A.
|
|
B.
|
|
C.
|
0.3010
|
D.
|
0.6990
|
|
15. The value of log343 7 is
A. 1/3 B.
- 3
C. -
1/3 D. 3
16. If logx 4 = 1/4, then x is equal to
A. 16 B.
64
C. 128
D. 256
17.
|
If
log10 2 = 0.3010, the value of log10 80 is:
|
A.
|
1.6020
|
B.
|
1.9030
|
C.
|
3.9030
|
D.
|
None of these
|
|
18.
|
If
log10 5 + log10 (5x + 1) = log10 (x + 5) + 1,
then x is equal to:
|
|
|
19. The value of log2(log5625) is
A. 2 B. 5
C. 10 D.15
20.
|
The value of
|
|
1
|
+
|
1
|
+
|
1
|
|
is:
|
log3 60
|
log4 60
|
log5 60
|
|
|
|
