Question

若

2

3

xy与-

1

2

x3-ay3-2b是同类项，则它们的和是______．

Answer 1

∵

2

3

xy与-

1

2

x3-ay3-2b是同类项，
∴

2

3

xy+（-

1

2

x3-ay3-2b）=

1

6

xy．
故答案

1

6

xy．