Question

If f(x) = x^2 + 9x and g(x) =1/x, find f(g(-1)).

Answer 1

@dcskaf

Answer 2

i got 1/9

Answer 3

ok just a sec

Answer 4

what did you get for g(-1)

Answer 5

i re did it and got 10

Answer 6

ok but what did you get for g(-1)

Answer 7

5

Answer 8

Can you show me the steps you took?

Answer 9

idk i was wondering if u could show me i'm kind of clueless

Answer 10

ok so to solve this kind of equations you have to look at the third instruction which here is f(g(-1))
this equation that x in g(x) is equal to -1 and that the outcome of g(-1) is the x in f(x)

Answer 11

so you plug it in to g(x) do you get it so far?

Answer 12

yah i guess so ???

Answer 13

all you have to know is you start with the inside equation first
so g(-1)=1/(-1)
= -1

Answer 14

Ok?

Answer 15

k

Answer 16

so since it is f(g(-1)) this means we can put -1 instead of g(-1)

Answer 17

because we solved for it before

Answer 18

k so the answer 10 srry this is timed and i only go 2 more mins

Answer 19

no 8

Answer 20

do u mean -8

Answer 21

oh yes