分式加减法.①3/x-1 - 3x/x-1 ②1/x-y - 2/y-x ③1/a+b - 2/a-b ④3y/2x+2y - x/x+y①3/x-1 - 3x/x-1 ②1/x-y - 2/y-x ③1/a+b - 2/a-b ④3y/2x+2y - x/x+y ⑤3/2m-n - m+n/(2m-n)^2
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/08 16:01:38
![分式加减法.①3/x-1 - 3x/x-1 ②1/x-y - 2/y-x ③1/a+b - 2/a-b ④3y/2x+2y - x/x+y①3/x-1 - 3x/x-1 ②1/x-y - 2/y-x ③1/a+b - 2/a-b ④3y/2x+2y - x/x+y ⑤3/2m-n - m+n/(2m-n)^2](/uploads/image/z/2095938-18-8.jpg?t=%E5%88%86%E5%BC%8F%E5%8A%A0%E5%87%8F%E6%B3%95.%E2%91%A03%2Fx-1+-+3x%2Fx-1+%E2%91%A11%2Fx-y+-+2%2Fy-x+%E2%91%A21%2Fa%2Bb+-+2%2Fa-b+%E2%91%A33y%2F2x%2B2y+-+x%2Fx%2By%E2%91%A03%2Fx-1+-+3x%2Fx-1+%E2%91%A11%2Fx-y+-+2%2Fy-x+%E2%91%A21%2Fa%2Bb+-+2%2Fa-b+%E2%91%A33y%2F2x%2B2y+-+x%2Fx%2By+%E2%91%A43%2F2m-n+-+m%2Bn%2F%282m-n%29%5E2)
分式加减法.①3/x-1 - 3x/x-1 ②1/x-y - 2/y-x ③1/a+b - 2/a-b ④3y/2x+2y - x/x+y①3/x-1 - 3x/x-1 ②1/x-y - 2/y-x ③1/a+b - 2/a-b ④3y/2x+2y - x/x+y ⑤3/2m-n - m+n/(2m-n)^2
分式加减法.①3/x-1 - 3x/x-1 ②1/x-y - 2/y-x ③1/a+b - 2/a-b ④3y/2x+2y - x/x+y
①3/x-1 - 3x/x-1 ②1/x-y - 2/y-x ③1/a+b - 2/a-b ④3y/2x+2y - x/x+y ⑤3/2m-n - m+n/(2m-n)^2
分式加减法.①3/x-1 - 3x/x-1 ②1/x-y - 2/y-x ③1/a+b - 2/a-b ④3y/2x+2y - x/x+y①3/x-1 - 3x/x-1 ②1/x-y - 2/y-x ③1/a+b - 2/a-b ④3y/2x+2y - x/x+y ⑤3/2m-n - m+n/(2m-n)^2
①3/x-1 - 3x/x-1 =(3-3x)/(x-1)=-3
②1/x-y - 2/y-x=1/(x-y)+2/(x-y)=3/(x-y)
③1/a+b - 2/a-b =(a-b)/(a+b)(a-b)-2(a+b)/(a+b)(a-b)=-(a+3b)/(a+b)(a-b)
④3y/2x+2y - x/x+y =3y/2(x+y) - 2x/2(x+y)=(3y-2x)/(x+y)
⑤3/2m-n - m+n/(2m-n)^2=3(2m-n)/(2m-n)² -(m+n)/(2m-n)²=(5m-4n)/(2m-n)²