donnie1999
  • donnie1999
If f(x) = x^2 + 9x and g(x) =1/x, find f(g(-1)).
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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donnie1999
  • donnie1999
@dcskaf
donnie1999
  • donnie1999
i got 1/9
anonymous
  • anonymous
ok just a sec

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anonymous
  • anonymous
what did you get for g(-1)
donnie1999
  • donnie1999
i re did it and got 10
anonymous
  • anonymous
ok but what did you get for g(-1)
donnie1999
  • donnie1999
5
anonymous
  • anonymous
Can you show me the steps you took?
donnie1999
  • donnie1999
idk i was wondering if u could show me i'm kind of clueless
anonymous
  • anonymous
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)
anonymous
  • anonymous
|dw:1436450939193:dw|
anonymous
  • anonymous
so you plug it in to g(x) do you get it so far?
donnie1999
  • donnie1999
yah i guess so ???
anonymous
  • anonymous
all you have to know is you start with the inside equation first so g(-1)=1/(-1) = -1
anonymous
  • anonymous
Ok?
donnie1999
  • donnie1999
k
anonymous
  • anonymous
so since it is f(g(-1)) this means we can put -1 instead of g(-1)
anonymous
  • anonymous
because we solved for it before
donnie1999
  • donnie1999
k so the answer 10 srry this is timed and i only go 2 more mins
anonymous
  • anonymous
no 8
donnie1999
  • donnie1999
do u mean -8
anonymous
  • anonymous
oh yes

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