Question

單項(xiàng)式-πa²b的系數(shù)是________，次數(shù)是________.4a³-a²b²-是________次多項(xiàng)式．

Answer 1

-π    3    4
分析：根據(jù)單項(xiàng)式系數(shù)的定義和多項(xiàng)式的次數(shù)的定義進(jìn)行解答即可，即單項(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：根據(jù)單項(xiàng)式的系數(shù)定義得：
單項(xiàng)式-πa²b的系數(shù)為-π，次數(shù)為3，
根據(jù)多項(xiàng)式的次數(shù)定義得：
多項(xiàng)式4a³-a²b²-的次數(shù)為4．
故答案為：-π，3，4．
點(diǎn)評：此題考查了單項(xiàng)式的系數(shù)和多項(xiàng)式的次數(shù)，解題的關(guān)鍵是對單項(xiàng)式的系數(shù)的定義和多項(xiàng)式的次數(shù)定義掌握好，此題較簡單．