"Everyone is wise until he speaks."
- (Proverb)
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Aptitude - Logarithm - Discussion
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| 5. |
| If log |
a |
+ |
log |
b |
= log (a + b), then: |
| b |
a |
|
| [A]. |
| a + b = 1 |
|
| [B]. |
a - b = 1 | | [C]. |
a = b | [D]. |
a2 - b2 = 1 |
Answer: Option A
Explanation:
| log |
a |
+ log |
b |
= log (a + b) |
| b |
a |
log (a + b) = log |
 |
a |
x |
b |
 |
= log 1. |
| b |
a |
So, a + b = 1.
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