# Stewart â€“ Calculus â€“ 3.1 â€“ Derivatives of Polynomials and Exponential Functions

(a) $f(x)=\frac{1}{x^{2}}$

(b) $y=\sqrt[{3}]{x^{2}}$

Find equations of the tangent line and normal line to the curve $y=x\sqrt{x}$ at the point $(1, 1)$. Illustrate by graphing the curve and these lines.

THE CONSTANT MULTIPLE RULE

$\frac{d}{\mathit{dx}}(3x^{4})$ $\frac{d}{\mathit{dx}}(-x)$

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