Question

f
$f {x} = 1 \div 1 - x {}^{2}$
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Answer 1

Answer:

$f(x) = \frac{1}{1} -x^{2} \\\\ \\1- x^{2} = 0\\ -x^{2} = -1\\x^{2} = 1\\Rooting\ in\ both\ sides \\\\x = 1$

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