Test: AP Calculus AB

f(x) = \frac{x^3}{1-x^2}

1.

What is the derivative of

\frac{x^2(3-x^2)}{(1-x^2)^2}

\frac{x^2(3-5x^2)}{1-x^2}

\frac{-2x^4-3 x^2(1-x^2)}{(1-x^2)^2}

-x

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