多项式x2y+4y2-1的次数是______．

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问题填空题

多项式x²y+4y²-1的次数是______．

答案

依题意得，多项式x²y+4y²-1一共有三项：x²y，4y²，-1，其中最高次项是x²y，

所以这个多项式的次数是3．

故答案为：3．

选择题

first time I met him in his office, he shook me by hand warmly and then introduce himself to me.

A．The;不填

B．The; The

C．The; a

D．A；不填

选择题

下列实验操作、现象和解释都正确的是