Question

多項(xiàng)式x²y-12xy+8的次數(shù)是

 

，常數(shù)項(xiàng)是

 

，單項(xiàng)式-

5

7

πx2y3的系數(shù)是

 

．

Answer 1

分析：根據(jù)多項(xiàng)式、單項(xiàng)式的有關(guān)概念進(jìn)行解答．

解答：解：多項(xiàng)式x²y-12xy+8中x²y的次數(shù)最高為3，次多項(xiàng)式的次數(shù)即為3．
單項(xiàng)式-

5

7

πx²y³的系數(shù)為-

5

7

π．

點(diǎn)評：本題主要對多項(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)．對于單項(xiàng)式的系數(shù)為：單項(xiàng)式中的數(shù)字因數(shù)．