(x+y分之x加x+y分之2y)乘x+2y分之xy除(x分之1加y分之1)等于?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/08 23:13:28
(x+y分之x加x+y分之2y)乘x+2y分之xy除(x分之1加y分之1)等于?(x+y分之x加x+y分之2y)乘x+2y分之xy除(x分之1加y分之1)等于?(x+y分之x加x+y分之2y)乘x+2

(x+y分之x加x+y分之2y)乘x+2y分之xy除(x分之1加y分之1)等于?
(x+y分之x加x+y分之2y)乘x+2y分之xy除(x分之1加y分之1)等于?

(x+y分之x加x+y分之2y)乘x+2y分之xy除(x分之1加y分之1)等于?
原式=[(x+2y)/(x+y)]×[xy/(x+2y)]÷[(x+y)/xy]
=[(x+2y)/(x+y)]×[xy/(x+2y)]×[xy/(x+y)]
=x²y²(x+2y)/[(x+y)²(x+2y)]
=x²y²/(x+y)²

小方桌的对角线即圆桌面的直径
根据勾股定理直径d2=1.22+1.22=2.88
圆桌面的面积=πr2=π(d/2)2=1/4πd2=1/2×3.14×2.88=4.5216≈4.52平方米