Question

3x²y是單項(xiàng)式，它的系數(shù)是          ,次數(shù)是        ．

Answer 1

3，3

試題分析：由于單項(xiàng)式中數(shù)字因數(shù)叫做單項(xiàng)式的系數(shù)，所有字母的指數(shù)和是單項(xiàng)式的次數(shù)，由此即可求解．
3x²y是單項(xiàng)式，它的系數(shù)是3，次數(shù)是3．
故答案為3，3．
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．分別找出單項(xiàng)式的系數(shù)和次數(shù)的規(guī)律也是解決此類問(wèn)題的關(guān)鍵．