展开 (n(n+1))/(2(2n+1))+(n+1)

解答

展开

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

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

求解步骤

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

去除括号:

(a) = a

= \frac{n ( n + 1 )}{2 ( 2 n + 1 )} + n + 1

\frac{n ( n + 1 )}{2 ( 2 n + 1 )} = \frac{n ^{2} + n}{4 n + 2}

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

e x p an d (5 + 3 e^{7 t})^{4}

s im pl i f y (1 + p - 2) (1 + p + 2)

e x p an d (y = 2, x + 6) (\frac{x}{2} - y = 3)

s im pl i f y (\frac{v}{2} - 1) \cdot (y + vu)

s im pl i f y (2 + 7 t) (8 - 5 t) + 2 (5 + t) (8.66)