展开 (2x^4+x^3)dx

解答

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(2 x^{4} + x^{3}) d x

2 x^{4} d x + x^{3} d x

求解步骤

(2 x^{4} + x^{3}) d x

使用分配律:

a (b + c) = ab + a c

a = d x, b = 2 x^{4}, c = x^{3}

= d x \cdot 2 x^{4} + d x x^{3}

= 2 x^{4} d x + x^{3} d x

e x p an d \frac{( x + 6 )}{( x - 1 ) ^{2}}

e x p an d (x + 2 - 3, 9 i) \cdot (x + 2 + 3.9 i)

e x p an d (3 x^{2} y + 2 x y + y^{3}) d y

e x p an d 2 (e^{- 5 t} - e^{t})

e x p an d 0.3 (12 + (- 16) = 0.4 (12 - 3 t))