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数学
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4x²-3x³-x-4+2x³+3x+x³+9,其中x=-1又1/2
人气:466 ℃ 时间:2019-11-11 19:16:21
解答
原式=4x²+2x+5
=4×9/4-2×3/2+5
=9-3+5
=11
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what does she liketo have?有没有对
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