Vishwanath
Tuesday, February 19, 2013
18. | If log10 5 + log10 (5x + 1) = log10 (x + 5) + 1, then x is equal to: |
| |
Answer: Option B
Explanation:
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.
Title : Logarithms Q18
Description : 18. If log10 5 + log10 (5x + 1) = log10 (x + 5) + 1, then x is equal to: A. 1 B. 3 C. 5 D. 10 Answer: Option B Explanation: log 10 5 ...
Rating : 5
