展开 (7e^2)/((7+e^2)^2)

解答

展开

\frac{7 e ^{2}}{( 7 + e ^{2} ) ^{2}}

\frac{7 e ^{2}}{49 + 14 e ^{2} + e ^{4}}

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0.24981 \dots

求解步骤

\frac{7 e ^{2}}{( 7 + e ^{2} ) ^{2}}

(7 + e^{2})^{2} = 49 + 14 e^{2} + e^{4}

= \frac{7 e ^{2}}{49 + 14 e ^{2} + e ^{4}}

e x p an d (2 \cdot α) \cdot (A \cdot \frac{C}{2} + B \frac{C}{2})

e x p an d \frac{( 9 x - 7 )}{( ( x + 3 ) ( x ^{(2)} - 1 ) )}

e x p an d \frac{8 ( 4 - 13 )}{3}

e x p an d \frac{21 x ^{2} - 5}{( 7 x - 5 ) ^{2}}

s im pl i f y 3 (\frac{- 75 x ^{2} + 264 x + 48}{16} + 6)