Question

多項(xiàng)式x³-2x²y²+3y²是________次________項(xiàng)式．

Answer 1

四    三
分析：根據(jù)多項(xiàng)式的定義，若干個(gè)單項(xiàng)式的和組成的式子叫做多項(xiàng)式．多項(xiàng)式中每個(gè)單項(xiàng)式叫做多項(xiàng)式的項(xiàng)，這些單項(xiàng)式中的最高次數(shù)，就是這個(gè)多項(xiàng)式的次數(shù)．
解答：根據(jù)多項(xiàng)式的定義，多項(xiàng)式x³-2x²y²+3y²是四次三項(xiàng)式．
故答案為：四，三．
點(diǎn)評(píng)：本題考查了多項(xiàng)式的次數(shù)和項(xiàng)的定義．解此類題目的關(guān)鍵是弄清多項(xiàng)式的次數(shù)是多項(xiàng)式中次數(shù)最高的項(xiàng)的次數(shù)，項(xiàng)數(shù)是單項(xiàng)式的個(gè)數(shù)．