化简 3x^{-2}-4x

解答

化简

3 x^{- 2} - 4 x

\frac{3}{x ^{2}} - 4 x

求解步骤

3 x^{- 2} - 4 x

使用指数法则:

a^{- b} = \frac{1}{a ^{b}}

x^{- 2} = \frac{1}{x ^{2}}

= 3 \cdot \frac{1}{x ^{2}} - 4 x

化简

3 \cdot \frac{1}{x ^{2}} : \frac{3}{x ^{2}}

= \frac{3}{x ^{2}} - 4 x

d er i v a t i v e e^{1 + (l n (x))^{2}}

1 - y^{2} d x - 1 - x^{2} d y = 0, y (0) = \frac{1}{2}

y^{^{'}} = e^{t - y}

\int (3 x - 11) e^{x} d x

3 y^{^{''}} - 7 y^{^{'}} + 2 y = 0, y (0) = - 3, y^{^{'}} (0) = - 8