展开 2/3 (x+pi/2)

解答

展开

\frac{2}{3} (x + \frac{π}{2})

\frac{2 x}{3} + \frac{π}{3}

求解步骤

\frac{2}{3} (x + \frac{π}{2})

使用分配律:

a (b + c) = ab + a c

a = \frac{2}{3}, b = x, c = \frac{π}{2}

= \frac{2}{3} x + \frac{2}{3} \cdot \frac{π}{2}

化简

\frac{2}{3} x + \frac{2}{3} \cdot \frac{π}{2} : \frac{2 x}{3} + \frac{π}{3}

= \frac{2 x}{3} + \frac{π}{3}

e x p an d (5 a - 2 b + 3) + (4 b - 3 a + 5)

e x p an d M (- 1, - 1)

e x p an d (0.58) (6.79) 0

e x p an d (x + 5) (x + Δ x)^{2} - 1

e x p an d x - 5 (- 2, - 6)