已知a+b=3,ab=2,则1/2a³b+a²b²+1/2ab³的值为____
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![已知a+b=3,ab=2,则1/2a³b+a²b²+1/2ab³的值为____](/uploads/image/z/1811999-47-9.jpg?t=%E5%B7%B2%E7%9F%A5a%2Bb%3D3%2Cab%3D2%2C%E5%88%991%2F2a%26%23179%3Bb%2Ba%26%23178%3Bb%26%23178%3B%2B1%2F2ab%26%23179%3B%E7%9A%84%E5%80%BC%E4%B8%BA____)
已知a+b=3,ab=2,则1/2a³b+a²b²+1/2ab³的值为____
已知a+b=3,ab=2,则1/2a³b+a²b²+1/2ab³的值为____
已知a+b=3,ab=2,则1/2a³b+a²b²+1/2ab³的值为____
1/2a³b+a²b²+1/2ab³
=1/2ab(a²+2ab+b²)
=1/2ab(a+b)²
=1/2×2×9
=9