作业帮分式计算,3和4
来源：学生作业帮助网 编辑：作业帮 时间：2024/06/04 07:54:26
xRn@(Ub;
۵!ML D
@HT캪Ɏo1U~#6jι^{_)g7W_~]}ϊxO:zwzQ T铧V~bzd<nfh<]kFEj';x> Q
{>'^c!!p-<"" >"8uL5HyK& lB " 3k% J/by D:I Jyd@Hmƅ~6a&[
c r`3BfJfbv 5H +9 J+߮Ŋ07z"C 3#S2{eKf<ӠA?%ᐪJT3u&.hTWLaSIiںCkZ7o[:6]JʺSkjvՒ cfS;e6}&?;t{jWO~l&w'5nPS7jcˮw._7߮R
分式计算,3和4
分式计算,3和4
分式计算,3和4
-1 1/(x-1)
3 ：(1/(x+1)-1/(x-1))/(2/(x+1)(x-1))
=(1/(x+1)*(x+1)(x-1)/2)-(1/(x-1)*(x+1)(x-1)/2)
=(x-1)/2-(x+1)/2
=(x-1-x-1)/2
=-1
4:原式=（x+1）/x÷(2x...
全部展开
3 ：(1/(x+1)-1/(x-1))/(2/(x+1)(x-1))
=(1/(x+1)*(x+1)(x-1)/2)-(1/(x-1)*(x+1)(x-1)/2)
=(x-1)/2-(x+1)/2
=(x-1-x-1)/2
=-1
4:原式=（x+1）/x÷(2x²-（1+x²）)/x
=（x+1）/x÷（x²-1）/x
=（x+1）/x*（x/（x+1)(x-1）
=1/(x-1)
收起