Question

多項(xiàng)式xy³-8x²y-x³y²-y是

五

次

四

項(xiàng)式，最高次項(xiàng)的系數(shù)為

-1

．

Answer 1

分析：根據(jù)多項(xiàng)式次數(shù)和項(xiàng)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)．

解答：解：xy³-8x²y-x³y²-y是五次四項(xiàng)式，最高次項(xiàng)是-x³y²，所以最高次項(xiàng)的系數(shù)為-1．
故應(yīng)填：五，四，-1．

點(diǎn)評：本題考查了多項(xiàng)式的有關(guān)概念，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)．