Question

多項(xiàng)式a³+2³a²-1是________次________ 項(xiàng)式．

Answer 1

三    三
分析：根據(jù)多項(xiàng)式次數(shù)的定義求解．多項(xiàng)式的次數(shù)是多項(xiàng)式中最高次項(xiàng)的次數(shù)，所以可知最高次項(xiàng)的次數(shù)為3．
解答：∵a³+2³a²-1最高次數(shù)是三次，有三項(xiàng)組成，
∴多項(xiàng)式a³+2³a²-1是三次三項(xiàng)式．
故答案為：三，三．
點(diǎn)評(píng)：本題考查了多項(xiàng)式的定義，解題的關(guān)鍵是弄清多項(xiàng)式次數(shù)是多項(xiàng)式中次數(shù)最高的項(xiàng)的次數(shù)．易錯(cuò)點(diǎn)：由于概念理解不透徹，容易出現(xiàn)錯(cuò)誤．