Question

If f(x) = x + 3

4x – 5

, g(x) = 3 + 5x

4x – 1 then show that

(fog) (x) = x.​

Answer 1

$\huge \sf \bf {\boxed{\underline {\red{\underline {✠Aɴʂᴡᴇʀ࿐ :−}}}}}$

(tex) ғ(x)=(x+)/(x-)

ɢ(x)=(+x)/(x-)

ᴛʜᴇɴ,

ғ.ɢ(x)=ғ{ɢ(x)}

=ғ{+x/x-}

={(+x)/(x-)+}/{(+x)/(x-)-}

={(+x+x-)/+x-x+}(/tex)

Answer 2

(tex) ғ(x)=(x+)/(x-)

ɢ(x)=(+x)/(x-)

ғ.ɢ(x)=ғ{ɢ(x)}

=ғ{+x/x-}

={(+x)/(x-)+}/{(+x)/(x-)-}

={(+x+x-)/+x-x+}(/tex)