化简 (2(x+1))/(sqrt(x^2+1))

解答

化简

\frac{2 ( x + 1 )}{x ^{2} + 1}

\frac{2 ( x + 1 ) x ^{2} + 1}{x ^{2} + 1}

求解步骤

\frac{2 ( x + 1 )}{x ^{2} + 1}

乘以共轭根式

\frac{x ^{2} + 1}{x ^{2} + 1}

= \frac{2 ( x + 1 ) x ^{2} + 1}{x ^{2} + 1 x ^{2} + 1}

x^{2} + 1 x^{2} + 1 = x^{2} + 1

= \frac{2 ( x + 1 ) x ^{2} + 1}{x ^{2} + 1}

d er i v a t i v e r^{2} - 9 x^{2}

N - 0.0002 N^{2} = \frac{d N}{d t}

x \to \infty + lim (x^{10})

\frac{\partial}{\partial x} (\frac{1}{cos ^{2} ( x )})

\int x 3 x^{2} - 1 d x