Question

單項(xiàng)式-

1

2

a²b⁴的系數(shù)是

-

1

2

．

Answer 1

分析：單項(xiàng)式中的數(shù)字因數(shù)是這個(gè)單項(xiàng)式的系數(shù)．

解答：解：-

1

2

a²b⁴=-

1

2

•a²b⁴，則該單項(xiàng)式的系數(shù)是-

1

2

．
故答案是：-

1

2

．

點(diǎn)評(píng)：本題考查了單項(xiàng)式．確定單項(xiàng)式的系數(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)的關(guān)鍵．