展开 (-sqrt(x^2+1)-1)/(x(sqrt(x^2+1)+x^2+1))

解答

展开

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

\frac{- x ^{2} + 1 - 1}{x x ^{2} + 1 + x ^{3} + x}

求解步骤

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

乘开

x (x^{2} + 1 + x^{2} + 1) : x x^{2} + 1 + x^{3} + x

= \frac{- x ^{2} + 1 - 1}{x x ^{2} + 1 + x ^{3} + x}

e x p an d \frac{2 ( x ^{4} - 3 x ^{3} + 1 )}{x ^{2}}

e x p an d sin (\frac{( 2 k + 1 ) π}{2})

e x p an d \frac{( 32 y + 1 ) ^{2}}{16}

e x p an d (x^{3} + 2 x) e^{5} x - 1

e x p an d \frac{1 - e ^{- 7 s}}{s ( s ^{2} + 2 s + 5 )}