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y 8x
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Y=-8x
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Answer to a math question Y=-8x
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$-8x=y$
$\begin{align*}&x=-\frac{ 1 }{ 8 }y \\&x=-0.125y\end{align*}$
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f(x)= 9-x^2 find (f(x+h)-f(x) )/h
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