Question

單項(xiàng)式-

1

3

xy3的次數(shù)是

 

．

Answer 1

分析：根據(jù)單項(xiàng)式次數(shù)的定義來求解，即所有字母的指數(shù)和叫做這個(gè)單項(xiàng)式的次數(shù)．

解答：解：該單項(xiàng)式的次數(shù)為：1+3=4．

點(diǎn)評(píng)：確定單項(xiàng)式的系數(shù)和次數(shù)時(shí)，把一個(gè)單項(xiàng)式分解成數(shù)字因數(shù)和字母因式的積，是找準(zhǔn)單項(xiàng)式的系數(shù)和次數(shù)的關(guān)鍵．