(x+y分之x + x+y分之2y)乘x+2y分之xy 除以(x分之1+y分之1)同样用两...

wm88092022-10-04 11:39:541条回答

(x+y分之x + x+y分之2y)乘x+2y分之xy 除以(x分之1+y分之1)同样用两...
(x+y分之x + x+y分之2y)乘x+2y分之xy 除以(x分之1+y分之1)同样用两种方式解答喔.

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xzh21centuryvip 共回答了22个问题 | 采纳率95.5%
是这样的形式吗?[x/(x+y)+2y/(x+y)]×[xy/(x+y)]÷(1/x+1/y)
一:原式=(x+2y)/(x+y) ×[xy/(x+2y)]÷[(x+y)/xy] =x²y²/(x+y)²
二:原式=xy/(x+y)÷(1/x+1/y)=x²y²/(x+y)²
1年前

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[x/(x+y)+2y/(x+y)]÷xy/(x+2y)÷(1/x+1/y)
=(x+2y)/(x+y)×(x+2y)/xy×xy/(x+y)
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2、原式=(a+b)²/a²b²÷(b²-a²)/a²b²=(a+b)²/a²b²*a²b²/(a+b)(b-a)=(a+b)/(b-a)
3、原式=9x^4/16y²×2y/3x+x²/2y²×x/2y²=3x³/8y+x³/4y^4
4、原式=(a+b)²/(a-b)²×2(a-b)/3(a+b)-a²/(a+b)(a-b)×b/a=2(a+b)/3(a-b)-ab/(a+b)(a-b)
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