(1/2x+2)-(x/x^2-1)+(1/x-1)分式加减
问题描述:
(1/2x+2)-(x/x^2-1)+(1/x-1)分式加减
答
原式=1/2X+2-x/x^2+1+1/x-1
=1/2X+3
答
(1/2x+2)-(x/x^2-1)+(1/x-1)
=1/2(x+1)- x/(x+1)(x-1)+1/(x-1)
=1/2(x+1)- x/(x+1)(x-1)+1/(x-1)
=(x-1-2x+2x+2)/2(x+1)(x-1)
=(x+1)/2(x+1)(x-1)
=1/2(x-1)
=1/(2x-2)