(1) (x^-1)+(y^-1)分之(x^-2)-(y^-2) (2) (y-x^-1)除以(x-y^-1) 一共两道题目怎么做
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![(1) (x^-1)+(y^-1)分之(x^-2)-(y^-2) (2) (y-x^-1)除以(x-y^-1) 一共两道题目怎么做](/uploads/image/z/1791756-36-6.jpg?t=%281%29+%28x%5E-1%29%2B%28y%5E-1%29%E5%88%86%E4%B9%8B%28x%5E-2%29-%28y%5E-2%29+%282%29+%28y-x%5E-1%29%E9%99%A4%E4%BB%A5%EF%BC%88x-y%5E-1%29+%E4%B8%80%E5%85%B1%E4%B8%A4%E9%81%93%E9%A2%98%E7%9B%AE%E6%80%8E%E4%B9%88%E5%81%9A)
(1) (x^-1)+(y^-1)分之(x^-2)-(y^-2) (2) (y-x^-1)除以(x-y^-1) 一共两道题目怎么做
(1) (x^-1)+(y^-1)分之(x^-2)-(y^-2) (2) (y-x^-1)除以(x-y^-1) 一共两道题目怎么做
(1) (x^-1)+(y^-1)分之(x^-2)-(y^-2) (2) (y-x^-1)除以(x-y^-1) 一共两道题目怎么做
(1)
原式=(1/x+1/y)/(1/x²-1/y²)
=(1/x+1/y)/[(1/x+1/y)(1/x-1/y)]
=1/(1/x-1/y)
=xy/(y-x)
(2)
原式=(y-1/x)/(x-1/y)
=[(xy-1)/x]/[(xy-1)/y]
=(1/x)/(1/y)
=y/x
化简1-x分之y分之1+x分之y
1- X+Y分之X-Y 分之 1+ X+Y分之X-Y
1- X+Y分之X-Y 分之 1+ X+Y分之X-Y
2x分之1- x+y分之1(2x分之x+y -x-y)化简
若X分之1+Y分之1=X+Y分之1 求X分之Y+Y分之X
x+y分之1-(x+y)的平方x-y
x-y分之1除以y-x分之1
化简(x+y分之1)(y+x分之1)
(x-y分之1)除以(y-x分之1)
(1+x分之y)除以(1-x分之y)
y-x分之1+2y-2x分之1
1-x分之2y-x-1分之y
x分之1+y分之1那个
{(x+y)分之2-(x-y)分之1=7 {(x+y)分之1+(x-y)分之1=-1
(y分之x减x分之y)除以(y分之x-2)除以(1+x分之y)
6分之x+y+10分之x-y=3,6分之x+y-10分之x-y=-1
y分之x=2分之1,则x+y分之x-y的值为
y+x分之x-y=7分之1,求y分之x