Question

單項(xiàng)式-的系數(shù)是________，次數(shù)是________；多項(xiàng)式3x²y-8x²y²-9的最高次項(xiàng)的系數(shù)為________．

Answer 1

-    3    -8
分析：根據(jù)單項(xiàng)式的系數(shù)和次數(shù)的概念以及多項(xiàng)式的有關(guān)概念進(jìn)行解答即可．
解答：?jiǎn)雾?xiàng)式-的系數(shù)是：-，次數(shù)是：3；
多項(xiàng)式3x²y-8x²y²-9的最高次項(xiàng)的系數(shù)為-8．
故填：-，3，-8．
點(diǎn)評(píng)：本題主要對(duì)多項(xiàng)式次數(shù)和系數(shù)的考查．將多項(xiàng)式分解成若干個(gè)單項(xiàng)式，其中單項(xiàng)式次數(shù)最高的一項(xiàng)的即為該單項(xiàng)式的次數(shù)．對(duì)于單項(xiàng)式的系數(shù)為：?jiǎn)雾?xiàng)式中的數(shù)字因數(shù)．