展开 (e^a)/((1+e^a)^2)

解答

展开

\frac{e ^{a}}{( 1 + e ^{a} ) ^{2}}

\frac{e ^{a}}{1 + 2 e ^{a} + e ^{2 a}}

求解步骤

\frac{e ^{a}}{( 1 + e ^{a} ) ^{2}}

(1 + e^{a})^{2} = 1 + 2 e^{a} + e^{2 a}

= \frac{e ^{a}}{1 + 2 e ^{a} + e ^{2 a}}

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

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

e x p an d 8 x^{2} - (24 x + 9) ln (x)

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

s im pl i f y tan^{2} (a) (2 \cdot cos^{2} (a) + sin^{2} (a) - 1)