If f(x) = x + 3

4x – 5

, g(x) = 3 + 5x

4x – 1 then show that

(fog) (x) = x.​

2 thoughts on “If f(x) = x + 3<br /><br />4x – 5<br /><br /> , g(x) = 3 + 5x<br /><br />4x – 1 then show that<br /><br />(fog) (x) = x.​”

1. (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)

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2. [tex]\huge \sf \bf {\boxed{\underline {\red{\underline {✠Aɴʂᴡᴇʀ࿐ :−}}}}} [/tex]

   (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)

   Reply