试题与答案

有一个多项式为a8﹣a7b+a6b2﹣a5b3+…,按照此规律写下去,这个多项式

题型:填空题

题目:

有一个多项式为a8﹣a7b+a6b2﹣a5b3+…,按照此规律写下去,这个多项式的第八项是(    )

答案:

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