Question

If f(x)=(x+7) and g(x)=(x-7) find (fog)(7)

Answer 1

Heya,

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Given,

f(x) = (x + 7)

putting x = g(x) in f(x) , we get

f(g(x)) = g(x) + 7

(fog) (x) = x - 7 + 7

(fog) (x) = x

Putting x = 7

(fog)(7) = 7 Answer.

Regards

Kshitij