(X + 1) /(x - 1)

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/19 17:31:22
(X + 1) /(x - 1)
xP1@ʖr9;lhcIa v je$g\Њ/x/dmi]0@1~Զ\tdV}Mb~MMPU+S[Ba|d"bwE/Ve:Go~xO.e 2 -t"k~Yuq xxǭU̚Ϝu#ӉVY LDP`6=^

(X + 1) /(x - 1)
(X + 1) /(x - 1)

(X + 1) /(x - 1)
(X + 1) /(x - 1)

(X + 1) /(x - 1) <1
(X + 1) /(x - 1) -1<0
(X + 1) /(x - 1) -(x - 1)/(x - 1)<0
(X + 1-x+1) /(x - 1)<0
2/(x - 1)<0

将右边的1移到左边,则变为(x+1)/(x-1)-(x-1)/(x-1)<0 分子相减得2,分母还是x-1

(x+1)/(x-1)<1
所以(x+1)/(x-1)-1<0
所以通分得,(x+1-x+1)/(x-1)<0
所以,2/(x-1)<0