展开-(2a)/(pi(n-1)(n+1))

解答

展开

- \frac{2 a}{π ( n - 1 ) ( n + 1 )}

- \frac{2 a}{π n ^{2} - π}

求解步骤

- \frac{2 a}{π ( n - 1 ) ( n + 1 )}

乘开

π (n - 1) (n + 1) : π n^{2} - π

= - \frac{2 a}{π n ^{2} - π}

s im pl i f y (7 x - 5 3 x) (3 x + 2)

e x p an d \frac{( z - i ) ^{4}}{z ^{8} + 1}

\frac{\partial}{\partial x} ((z) (8 x yz - e^{z}))

e x p an d lo g_{10} (x^{- 3} y^{2})

s im pl i f y (2 x - 3 i)^{2}