Question

Function help please? Check my answer?

Answer 1

I got D

Answer 2

can you please tell me how did you get D ?? :-)

Answer 3

@nnesha
Someone started me off and told me I had to square it
(g∘f)(x)=g(f(x))=g(7x+1)=(7x+1)2=(7x+1)(7x+1)

Answer 4

@Nnesha Would that make it C or A then?

Answer 5

you don't have to square anything
(f o g)(x) meaning first replace x by x into this equation f(x)
so this one is easy when you replace x by x you would get same thing
for example \[\rm g(x) = x^2\] replace x by x \[\large \color{red}{x}\]
\[\huge\rm g(\color{red}{x})=(\color{red}{x})^2\]
so g(x) still equal to x^2
substiute
then replace x which is in g(x) function by f(x)
so yes your answer is right :-)