分式加减法计算⑴ 5/6xy - 2/3xz + 3/4xyz ⑵ 【(x^5-x³y²)/(y^4)】·(1/x²y²)³ - (x+y)/y³

问题描述:

分式加减法计算

5/6xy - 2/3xz + 3/4xyz

【(x^5-x³y²)/(y^4)】·(1/x²y²)³ - (x+y)/y³

1)5/6xy - 2/3xz + 3/4xyz=10z/(12xyz)-8y/(12xyz)+9/(12xyz)=(10z-8y+9)/(12xyz)2)【(x^5-x³y²)/(y^4)】·(1/x²y²)³ - (x+y)/y³=(x^5-x^3y^2)/(y^4x^6y^6)-(x+y)/y...