Question

單項(xiàng)式-8a⁴b²的次數(shù)是

1. A.
   -8
2. B.
   6
3. C.
   4
4. D.
   2

Answer 1

B
分析：根據(jù)單項(xiàng)式次數(shù)的定義來求解．單項(xiàng)式中所有字母的指數(shù)和叫做這個(gè)單項(xiàng)式的次數(shù)．
解答：根據(jù)單項(xiàng)式定義得：單項(xiàng)式7ab²c³的次數(shù)是4+2=6．
故選B．
點(diǎn)評：本題考查了單項(xiàng)式次數(shù)的定義．確定單項(xiàng)式的次數(shù)時(shí)，把一個(gè)單項(xiàng)式分解成數(shù)字因數(shù)和字母因式的積的形式，是找準(zhǔn)單項(xiàng)式的系數(shù)和次數(shù)的關(guān)鍵．