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Digiron [165]
3 years ago
15

Find the domain of f(x)=x-9/x squared-81

Mathematics
1 answer:
vagabundo [1.1K]3 years ago
7 0

f(x)=\dfrac{x-9}{x^2-81}\\\\\text{The domain:}\\\\x^2-81\neq0\qquad\text{add 81 to both sides}\\\\x^2\neq81\to x\neq\pm\sqrt{81}\\\\x\neq-9\ \wedge\ x\neq9\\\\Answer:\ \boxed{\text{All real numbers except -9 and 9}}\to\boxed{x\in\mathbb{R}-\{-9,\ 9\}}

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8 0
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evablogger [386]

Answer:

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B (-5, 2)  be (x2, y2)

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7 0
3 years ago
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Alenkasestr [34]
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6 0
3 years ago
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Anuta_ua [19.1K]
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7 0
2 years ago
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choli [55]
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8 0
3 years ago
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