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If f(x) =(sqrtx+7-4)/(x-9), " then range...

If `f(x) =(sqrtx+7-4)/(x-9), " then range of " y = cos^(-1) (4f(x))` is

A

`[0,pi/2)`

B

`(0,pi/2]`

C

`[0, pi/2)-{pi/3}`

D

`[0,pi/2)-{pi/6}`

Text Solution

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The correct Answer is:
C
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