X²-1分之X²-2X除以（X+1分之2X-1减X+1）当X等于2时,求值_数学解答

X²-1分之X²-2X除以（X+1分之2X-1减X+1）当X等于2时,求值

人气：393 ℃　时间：2020-06-17 02:56:32

解答

(x^2-2x)/(x^2-1)÷[(2x-1)/(x+1)-x+1]=(x^2-2x)/(x^2-1)÷[(2x-1)/(x+1)-(x-1)(x+1)/(x+1)]=(x^2-2x)/(x^2-1)÷[(2x-1)/(x+1)-(x^2-1)/(x+1)]=(x^2-2x)/(x^2-1)÷[(2x-1-x^2+1)/(x+1)]=(x^2-2x)/(x^2-1)÷[(2x-x^2)...