Question

多項(xiàng)式1-

2

7

x2y-

1

6

x4y是一個(gè)

 

次

 

項(xiàng)式，最高次項(xiàng)的系數(shù)是

 

．

Answer 1

分析：根據(jù)多項(xiàng)式的性質(zhì)進(jìn)行解答．多項(xiàng)式的次數(shù)是多項(xiàng)式中最高次項(xiàng)的次數(shù)，多項(xiàng)式的項(xiàng)數(shù)為組成多項(xiàng)式的單項(xiàng)式的個(gè)數(shù)．

解答：解：此多項(xiàng)式共含有三個(gè)單項(xiàng)式，三個(gè)單項(xiàng)式中未知數(shù)次數(shù)總和最大的為5，其系數(shù)為-

1

6

．

點(diǎn)評(píng)：本題重點(diǎn)對(duì)多項(xiàng)式的項(xiàng)數(shù)、次數(shù)和系數(shù)判斷的考查．多項(xiàng)式中含多項(xiàng)式的個(gè)數(shù)即為幾次多項(xiàng)式，包含的單項(xiàng)式中未知數(shù)次數(shù)和的最大值即為此多項(xiàng)式的次數(shù)．