Let f(x)={(72^x -9^x- 8^x +1)/(sqrt2-sq...

Let `f(x)={(72^x -9^x- 8^x +1)/(sqrt2-sqrt(1+cosx)) ; x != 0 and k log2 log3 ; x=0` .If f is continuous functioin at `x=0` , then k=

A

`sqrt2`

B

`24`

C

`18sqrt3`

D

`24sqrt2`

Text Solution

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The correct Answer is:

D

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