化简 4x^3(1-2/(x+1))

解答

化简

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

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

求解步骤

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

合并

1 - \frac{2}{x + 1} : \frac{x - 1}{x + 1}

= 4 x^{3} \frac{x - 1}{x + 1}

使用分式法则:

a \cdot \frac{b}{c} = \frac{a \cdot b}{c}

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

s im pl i f y (x - 16) \cdot (\frac{3}{x - 16} + 900 - 9 x)

e x p an d \frac{x + 8}{( x + 2 ) ( x - 4 )}

e x p an d \frac{1}{s ^{n} ( s - 8 )}

e x p an d 0.5 (e^{a t} + e^{- a t}) u (t)

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