化简 1/2+3/32 (4(0.4)-((0.4)^3)/3)

解答

化简

\frac{1}{2} + \frac{3}{32} (4 (0.4) - \frac{( 0.4 ) ^{3}}{3})

0.648

求解步骤

\frac{1}{2} + \frac{3}{32} (4 (0.4) - \frac{0. 4 ^{3}}{3})

去除括号:

(a) = a

= \frac{1}{2} + \frac{3}{32} (4 \cdot 0.4 - \frac{0. 4 ^{3}}{3})

\frac{3}{32} (4 \cdot 0.4 - \frac{0. 4 ^{3}}{3}) = 1.57866 \dots \cdot \frac{3}{32}

= \frac{1}{2} + 1.57866 \dots \cdot \frac{3}{32}

\frac{3}{32} \cdot 1.57866 \dots = 0.148

= \frac{1}{2} + 0.148

转换为小数形式

\frac{1}{2} = 0.5

= 0.5 + 0.148

数字相加:

0.5 + 0.148 = 0.648

= 0.648

e x p an d \frac{20}{( x + 3 ) ( x - 5 )}

e x p an d (e^{x}) (2 x + 1)

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

e x p an d - u_{2} e^{t - 2} + u_{2} e^{2 (t - 2)}

e x p an d \frac{( 4 x + 5 ) ( 2 x + 3 )}{2}