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Let f :[2,oo)to {1,oo) defined by f (x)=...

Let `f :[2,oo)to {1,oo)` defined by `f (x)=2^(x ^(4)-4x ^(3))and g : [(pi)/(2), pi] to A ` defined by `g (x) = (sin x+4)/(sin x-2)` be two invertible functions, then
The set "A" equals to

A

[-5,-2]

B

[2,5]

C

[-5,2]

D

[-3,-2]

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a
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