anonymous
  • anonymous
Let and Find ( g o f)(­ -7)
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
|dw:1439474897144:dw|
anonymous
  • anonymous
first find \[f(-7)=(-7)^2+6\] what do you get?
dinamix
  • dinamix
(gof)(-7) = 1+ 8/45 cuz (gof)(x) = 1+(8/(x^2+6))

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anonymous
  • anonymous
actually that is not quite correct
dinamix
  • dinamix
lol
dinamix
  • dinamix
why ?
dinamix
  • dinamix
solution is (gof)(-7) = 1+8/55 sorry for this mistake but i am sure for this
SolomonZelman
  • SolomonZelman
\(\large\displaystyle g(x)=\frac{x+8}{x}\) \(\large\displaystyle f(x)=x^2+6\) \(\large\displaystyle g^\circ f=g(f(x))=\frac{(x^2+6)+8}{(x^2+6)}\) \(\large\displaystyle g^\circ f=g(f(x))=\frac{8}{(x^2+6)}+1\)
SolomonZelman
  • SolomonZelman
then plug in -7 for x (I swear this italian keyboard stinks)
anonymous
  • anonymous
lol
dinamix
  • dinamix
i find it before u mate ;D
anonymous
  • anonymous
@Dajala seems to have pulled a runner

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