Question

單項(xiàng)式-

2xy

3

的次數(shù)是

2

，系數(shù)是

-

2

3

．多項(xiàng)式2x²-3x+5是

二

次

三

 項(xiàng)式．

Answer 1

分析：根據(jù)單項(xiàng)式的次數(shù)和系數(shù)的定求單項(xiàng)式-

2xy

3

的次數(shù)和系數(shù)；根據(jù)多項(xiàng)式的有關(guān)定義可確定2x²-3x+5是二次三項(xiàng)式．

解答：解：?jiǎn)雾?xiàng)式-

2xy

3

的次數(shù)是2，系數(shù)是-

2

3

；多項(xiàng)式2x²-3x+5是二次三項(xiàng)式．
故答案為2，-

2

3

；二，三．

點(diǎn)評(píng)：本題考查了多項(xiàng)式：幾個(gè)單項(xiàng)式的和叫做多項(xiàng)式，每個(gè)單項(xiàng)式叫做多項(xiàng)式的項(xiàng)，其中不含字母的項(xiàng)叫做常數(shù)項(xiàng)．多項(xiàng)式中次數(shù)最高的項(xiàng)的次數(shù)叫做多項(xiàng)式的次數(shù)．也考查來(lái)哦單項(xiàng)式．