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f ( x ) = x 3 − 4 x d d x [ x 3 − 4 x ] = d d x [ x 3 ] − 4 ⋅ d d x [ x ] = 3 x 2 − 4 ⋅ 1 = 3 x 2 − 4 f ( x ) = x 3 5 d d x [ x 3 5 ] = 3 5 ⋅ x 3 5 − 1 = 3 5 x 2 5

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