jejdnekwbs jejdnekwbs
  • 21-05-2018
  • Mathematics
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For f(x)=2x+1 and g(x)=x^2-7, find (fog)(2)

For fx2x1 and gxx27 find fog2 class=

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ktreyb
ktreyb ktreyb
  • 21-05-2018
(f o g)(x) = f(g(x))

f(g(x)) = 2(x² - 7) + 1

= 2x² - 14 + 1
= 2x² - 13

(f o g)(2) = f(g(2))

2(2)² - 13
2(4) - 13
8 - 13
- 5

(f o g)(2) = - 5
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