x+1分之1+2= 2x分之y+(3x的平方)分之y= (a的平方-4)分之(a-6)+(a-2)分之1
问题描述:
x+1分之1+2= 2x分之y+(3x的平方)分之y= (a的平方-4)分之(a-6)+(a-2)分之1
答
x+1分之1+2=
=[1+2(x+1)]/(x+1)
=(2x+3)/(x+1)
2x分之y+(3x的平方)分之y=
=(3xy+y)/6x²
(a的平方-4)分之(a-6)+(a-2)分之1
=[(a-6)+(a+2)]/(a+2)(a-2)
=(2a-4)/(a+2)(a-2)
=2/(a+2)