Question

單項(xiàng)式-

3

4

πy2的系數(shù)是

 

；多項(xiàng)式3abc-4a²b²c+5a³b中次數(shù)最高項(xiàng)的次數(shù)是

 

．

Answer 1

分析：根據(jù)單項(xiàng)式系數(shù)的定義和多項(xiàng)式的次數(shù)的定義來求解．單項(xiàng)式中數(shù)字因數(shù)叫做單項(xiàng)式的系數(shù)；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：單項(xiàng)式-

3

4

πy2的系數(shù)是-

3

4

π；
多項(xiàng)式3abc-4a²b²c+5a³b中次數(shù)最高項(xiàng)的次數(shù)是5．
故答案為：-

3

4

π；5．

點(diǎn)評：本題主要考查了多項(xiàng)式的次數(shù)的定義．多項(xiàng)式中未知數(shù)的次數(shù)總和的最大值即為多項(xiàng)式的次數(shù)．