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If a = log(245) 175 and b = log(1715) ...

If ` a = log_(245) 175 and b = log_(1715) 875,` then the value of `(1-ab)/(a-b)` is ________.

A

7

B

5

C

`-5`

D

`-7 `

Text Solution

Verified by Experts

The correct Answer is:
B
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