已知a+b=2,ab=2,求½a³b+a²b²+½ab³的值.
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已知a+b=2,ab=2,求½a³b+a²b²+½ab³的值.
已知a+b=2,ab=2,求½a³b+a²b²+½ab³的值.
已知a+b=2,ab=2,求½a³b+a²b²+½ab³的值.