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Let f(x)=a x+ba n dg(x)=c x+d , a!=0. As...

Let `f(x)=a x+ba n dg(x)=c x+d , a!=0.` Assume `a=1,b=2.` If `(fog)(x)=(gof)(x)` for all `x ,` what can you say about `ca n dd ?`

A

c and d both arbitary

B

c=1, d arbitrary

C

c arbitrary, d=1

D

c=1,d=1

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B
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