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Vadim26 [7]
3 years ago
12

I need help on this question pls answer :(

Mathematics
1 answer:
Oxana [17]3 years ago
6 0

Answer:

Option 3

Step-by-step explanation:

Given functions are,

f(x) = \frac{1}{x-3}

g(x) = \sqrt{x+5}

Therefore, composite function (f o g) will be,

(f o g)(x) = f[g(x)]

             = \frac{1}{\sqrt{x+5} -3}

This function will be defined for,

Denominator > 0

\sqrt{x+5}-3>0

\sqrt{x+5} >3

(x+5)>3^2

x+5>9

x>9-5

x>4

And x+5\geq 0

x\geq -5

Therefore, domain of the composite function will be,

[-5, 4) ∪ (4, ∞)

Option 3 will be the answer.

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