Question

f(x)=2x - 5
-------
4x + 2
g(x) = 2x^2 + 7
Find: f(g(x))
Please helpppp !!!!

Answer 1

if
f(x) = 2x - 5 and
g(x) = 2x^2 + 7
and you have to find f(g(x)),
then replace x in f(x) with 2x^2 + 7

Answer 2

i dont get it?

Answer 3

Not sure if I can explain this very well but...
if the function is defined as
f(x) = x^2
then f(z) = z^2 or f(q) = q^2
Meaning whichever is defined in the parentheses in the function 'f' is the variable given in the function itself, in this case <something>^2
so if f is given as f(1+x) then
f(1+x) = (1+x)^2
since the function is <something>^2

so in case of f(g(x)), this means that any 'x' in the function defined by f(x) needs to be replaced by the definition of g(x)

One thing I don't understand from your question is this

-------
4x + 2

What does this mean?