# Math

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f(x)=1/x, g(x)=3X+1 find:
f(g(3)) how do i do thiss...
f(g(-2))

• Math -

you can first find g(3) = 10
then do f(1) = 1/10

so g(g(3)) = 1/10

you try the other one.

another way is to find f(g(x)) itself.
this would be practical if you had a whole bunch of question to find

f(g(x))
= 1/(3x+1)

notice the right side gives you 1/10 directly

• Math -

my third line should have said

f(g(3)) = 1/10

e.g. gºg would mean g(g(x))
= 3(3x+1) + 1
= 9x+ 4

• Math -

OHHH thanks reiniyyyy

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