展开 2pi(c^3-(c^7)/7)

解答

展开

2 π (c^{3} - \frac{c ^{7}}{7})

2 π c^{3} - \frac{2 π c ^{7}}{7}

求解步骤

2 π (c^{3} - \frac{c ^{7}}{7})

使用分配律:

a (b - c) = ab - a c

a = 2 π, b = c^{3}, c = \frac{c ^{7}}{7}

= 2 π c^{3} - 2 π \frac{c ^{7}}{7}

乘

2 π \frac{c ^{7}}{7} : \frac{2 π c ^{7}}{7}

= 2 π c^{3} - \frac{2 π c ^{7}}{7}

e x p an d \frac{d ^{50410}}{4 ( 18 )}

e x p an d \frac{0.1 s + 1}{s ^{2} ( 0.1 s + 1 ) + 1}

e x p an d \frac{( 3 + 1 ) 27}{2}

e x p an d 2 (2 x + 3 = - 10)

e x p an d \frac{1}{s ( s ^{2} + 4 s + 4 )}