(x-1)/(x+1)-4x/(1-x^2) 计算

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/06 08:34:52
(x-1)/(x+1)-4x/(1-x^2) 计算
x){BN}K5q u+⌀\>_7&Hv6o=@-jʆ@M`m>L(TS6H6im,V!C 젞s^,_ VV c XZ@!

(x-1)/(x+1)-4x/(1-x^2) 计算
(x-1)/(x+1)-4x/(1-x^2) 计算

(x-1)/(x+1)-4x/(1-x^2) 计算
原式=(x-1)²/(x+1)(x-1)+4x/(x+1)(x-1)
=(x²-2x+1+4x)/(x+1)(x-1)
=(x²+2x+1)/(x+1)(x-1)
=(x+1)²/(x+1)(x-1)
=(x+1)/(x-1)


(x-1)/(x+1)-4x/(1-x²)
=(x-1)²/(x+1)(x-1)+4x/(x²-1)
=(x²-2x+1)/(x+1)(x-1)+4x/(x-1)(x+1)
=(x²-2x+1+4x)/(x+1)(x-1)
=(x²+2x+1)/(x+1)(x-1)
=(x+1)²/(x+1)(x-1)
=(x+1)/(x-1)