已知有理数a b c满足│b│=—b,│a│=—2a,│a+b│·c=1,化简│3a—b│—│—b+c+2│
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![已知有理数a b c满足│b│=—b,│a│=—2a,│a+b│·c=1,化简│3a—b│—│—b+c+2│](/uploads/image/z/6821515-19-5.jpg?t=%E5%B7%B2%E7%9F%A5%E6%9C%89%E7%90%86%E6%95%B0a++b+c%E6%BB%A1%E8%B6%B3%E2%94%82b%E2%94%82%3D%E2%80%94b%2C%E2%94%82a%E2%94%82%3D%E2%80%942a%2C%E2%94%82a%2Bb%E2%94%82%C2%B7c%3D1%2C%E5%8C%96%E7%AE%80%E2%94%823a%E2%80%94b%E2%94%82%E2%80%94%E2%94%82%E2%80%94b%2Bc%2B2%E2%94%82)
已知有理数a b c满足│b│=—b,│a│=—2a,│a+b│·c=1,化简│3a—b│—│—b+c+2│
已知有理数a b c满足│b│=—b,│a│=—2a,│a+b│·c=1,化简│3a—b│—│—b+c+2│
已知有理数a b c满足│b│=—b,│a│=—2a,│a+b│·c=1,化简│3a—b│—│—b+c+2│
-6a+b-b+1/(a+b)+2