(本題滿分6分)解方程:
解:方程兩邊同乘以-2,得1-+2(-2)=1, ············································ 2分
即1-+2-4=1,···················································································· 4分
解得=4.···························································································· 5分
經(jīng)檢驗, =4是原方程的根.···································································· 6分
解析:略
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