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blsea [12.9K]
3 years ago
13

PLEASE HELP ME!!!!!!!!!!!!! Let f(x)=x^2+7 and g(x)=x-3/x find (f o g) (-8)

Mathematics
2 answers:
blagie [28]3 years ago
7 0

Answer:

f{\circ }g(-8)=\frac{781}{8}

Step-by-step explanation:

We have been given two function f(x)=x^2+7 and g(x)=\frac{x-3}{x}. We are asked to find f{\circ }g(-8).

By the definition of composite functions f{\circ}g(x)=f(x)\cdot g(x).

f{\circ }g(-8)=f(-8)\cdot g(-8)

f(-8)=(-8)^2+7

f(-8)=64+7

f(-8)=71

g(-8)=\frac{-8-3}{-8}

g(-8)=\frac{-11}{-8}

g(-8)=\frac{11}{8}

f{\circ }g(-8)=71\cdot \frac{11}{8}

f{\circ }g(-8)=\frac{781}{8}

Therefore, f{\circ}g(x)=\frac{781}{8}.

sashaice [31]3 years ago
3 0
X=-56 that is the answer
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