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C3 functions and graphs

f45

The functions f and g are defined as
f(x)= (x)/(x-2)
g(x)=3/(x)

Calculate g(f(1.5))

Ummm, I have no idea what to do???

and then

find the values of x for which g(x)=f(x)+4

again I have no idea what to do?
Btw, we've been told we can use graphing software

Reply 1

vc94

Substitute 1.5 into f(x), then substitute the answer into g(x).

For g(x)=f(x)+4, can you solve this algebraically?

Reply 2

f45

Ah ok

for the 2nd bit, would I just replace both f(x) and g(x) with the actual equation??

Reply 3

sheligalo

f45

Ah ok

for the 2nd bit, would I just replace both f(x) and g(x) with the actual equation??

Correct yes.

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