24-05-2021
Mathematics

contestada

f(x)=x2+3 & g(x)=2x−7
1) (f−g)(x)=
2) (f⋅g)(x)=
3) (f°g)(5)=
4) (g°f)(x)=

Respuesta :

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24-05-2021

Step-by-step explanation:

1)

f-g(x)
x²+3-2x+7
x²-2x+10

2)

f×g(x)
(x²+3)(2x-7)
2x³-7x²+6x-21

3)

fog(5)
f(g(5))
f(2×5-7)
f(3)
3²+3
9+3
12

4)

gof(x)
g(f(x))
g(x²+3)
(2x-7)²+3
2x²-2×2x×7+7²
2x²-28x+49

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