Question

單項(xiàng)式-

2πab2

5

的系數(shù)是

 

，多項(xiàng)式-

2πab2

5

+3bc-1的次數(shù)是

 

．

Answer 1

分析：π也屬于數(shù)字因數(shù)，單項(xiàng)式的系數(shù)為所有數(shù)字因數(shù)；多項(xiàng)式的最高次項(xiàng)為：-

2πab2

5

，讓a的指數(shù)和b的指數(shù)相加即為多項(xiàng)式的次數(shù)．

解答：解：單項(xiàng)式-

2πab2

5

的系數(shù)是-

2π

5

，多項(xiàng)式-

2πab2

5

+3bc-1的次數(shù)是3．

點(diǎn)評：單項(xiàng)式的系數(shù)為所有數(shù)字因數(shù)；多項(xiàng)式中次數(shù)最高項(xiàng)的次項(xiàng)就是這個(gè)多項(xiàng)式的次數(shù)．