展开 (-5/6 ,-3/2)y(11/2 , 1/3)

解答

展开

(- \frac{5}{6}, - \frac{3}{2}) y (\frac{11}{2}, \frac{1}{3})

- \frac{5}{6} (\frac{1}{3} \cdot \frac{11}{2},) y, - \frac{3}{2} (\frac{1}{3} \cdot \frac{11}{2},) y

求解步骤

(- \frac{5}{6}, - \frac{3}{2}) y (\frac{11}{2}, \frac{1}{3})

= (- \frac{5}{6}, - \frac{3}{2}) (\frac{1}{3} \cdot \frac{11}{2},) y

使用分配律:

a (b - c) = ab - a c

a = y (\frac{11}{2}, \frac{1}{3}), b = - \frac{5}{6},, c = \frac{3}{2}

= y (\frac{11}{2}, \frac{1}{3}) (- \frac{5}{6},) - y (\frac{11}{2}, \frac{1}{3}) \frac{3}{2}

使用加减运算法则

+ (- a) = - a

= - \frac{5}{6} (\frac{1}{3} \cdot \frac{11}{2},) y, - \frac{3}{2} (\frac{1}{3} \cdot \frac{11}{2},) y

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