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underset(x to 0)(lim) (5^(x) + 4^(x) - 2...

`underset(x to 0)(lim) (5^(x) + 4^(x) - 2^(x) -1)/(5x)` is equal to

A

`log10//5`

B

`1`

C

`0`

D

logx.

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The correct Answer is:
A
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