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If "f"("x")=x+7 and g(x)=x-7,\ x\ \ R , ...

If `"f"("x")=x+7` and `g(x)=x-7,\ x\ \ R ,` find `(fog)(7)`

A

7

B

0

C

14

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
Given `f(x)=x+7` and `g(x)=x-7, x in R`

`{fog}(x)=f(g(x))=g(x)+7=(x-7)+7=x `

`=>(f circ g)(7)=7`

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