展开 6(1/2)^4+2(1/2)^3-12(1/2)^2+3

解答

展开

6 (\frac{1}{2})^{4} + 2 (\frac{1}{2})^{3} - 12 (\frac{1}{2})^{2} + 3

\frac{5}{8}

十进制

0.625

求解步骤

6 (\frac{1}{2})^{4} + 2 (\frac{1}{2})^{3} - 12 (\frac{1}{2})^{2} + 3

6 (\frac{1}{2})^{4} = \frac{3}{8}

2 (\frac{1}{2})^{3} = \frac{1}{4}

12 (\frac{1}{2})^{2} = 3

= \frac{3}{8} + \frac{1}{4} - 3 + 3

- 3 + 3 = 0

= \frac{3}{8} + \frac{1}{4}

8, 4

的最小公倍数:

8

根据最小公倍数调整分式

= \frac{3}{8} + \frac{2}{8}

因为分母相等，所以合并分式:

\frac{a}{c} \pm \frac{b}{c} = \frac{a \pm b}{c}

= \frac{3 + 2}{8}

数字相加:

3 + 2 = 5

= \frac{5}{8}

e x p an d \frac{( s + 0.1 ) ( s + 500 )}{( s + 30 ) ^{2}}

e x p an d ro t a c i o na l (x^{2} - 2 y^{2} + 4)

e x p an d 2 (X + 3)

e x p an d l im x \Rightarrow 0 (5 \cdot 2^{x} \cdot cos (x) - 4)

e x p an d ln (a) r i t m os \frac{( 2 x + 1 ) ( 3 x - 1 )}{4 x + 3}