Answer: Option A
Explanation:
If log10 2 = 0.3010, then log2 10 is equal to:
0.3010
0.6990
Answer: Option B
If log10 2 = 0.3010, the value of log10 80 is:
1.9030
3.9030
None of these
If log10 5 + log10 (5x + 1) = log10 (x + 5) + 1, then x is equal to:
3
5
10
log10 5 + log10 (5x + 1) = log10 (x + 5) + 1
log10 5 + log10 (5x + 1) = log10 (x + 5) + log10 10
log10 [5 (5x + 1)] = log10 [10(x + 5)]
5(5x + 1) = 10(x + 5)
5x + 1 = 2x + 10
3x = 9
x = 3.