展开 (n^2)/((2n-1)(2n+1))

解答

展开

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

\frac{n ^{2}}{4 n ^{2} - 1}

求解步骤

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

乘开

(2 n - 1) (2 n + 1) : 4 n^{2} - 1

= \frac{n ^{2}}{4 n ^{2} - 1}

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e x p an d - 2 (1 - 6 r = 82)

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e x p an d \frac{L ^{2} ( P + W L )}{16}

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