将多项式5x3y-y4+2xy2-x4按x的降幂排列是( )A.-x4+5x3y+2xy2-y4B.-y4+5x3y+2xy2-y4C.-x4+5x3y-y4
题型:单选题难度:简单来源:不详
将多项式5x3y-y4+2xy2-x4按x的降幂排列是( )A.-x4+5x3y+2xy2-y4 | B.-y4+5x3y+2xy2-y4 | C.-x4+5x3y-y4+2xy2 | D.2xy2+5x3y-y4-x4 |
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答案
5x3y-y4+2xy2-x4=-x4+5x3y+2xy2-y4. 故选A. |
举一反三
多项式4xy2-3xy3+12中次数最高项的次数和系数分别为( ) |
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多项式2x2+4x3-3是______次______项式,常数项是______. |
多项式x2+2kxy-3y2+x-12不含xy的项,则k=______. |
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