think

来源：学生作业学帮网编辑：学帮网时间：2024/05/13 19:31:16

think

2（t-1）²+t=1
2（t-1）²+t-1=0
(2t-1)(t-1)=0
t-1=0或2t-1=0
t1=1 t2=½

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