x-y分之1除以(y分之一-x分之一) 化简x-y分之1除以(y分之一-x分之一) 化简
问题描述:
x-y分之1除以(y分之一-x分之一) 化简
x-y分之1除以(y分之一-x分之一) 化简
答
1/(x-y)÷(1/y-1/x)=1(x-y)÷(x-y)/xy=1/(x-y)*xy/(x-y)=xy/(x-y)²
答
1/(x-y) ÷ (1/y -1/x)
= 1/(x-y) ÷ (x-y)/(xy)
= 1/(x-y) × xy /(x-y)
= xy /(x-y)²