Question

已知代数式2a3bn+1与-3am-2b2是同类项，则m+2n=______．

试题难度：难度：中档 试题类型：填空题 试题内容：已知代数式2a3bn+1与-3am-2b2是同类项，则m+2n=______．

Answer 1

试题答案：∵代数式2a3bn+1与-3am-2b2是同类项，
∴m-2=3，n+1=2，
解得，m=5，n=1，
∴m+2n=5+2=7．
故答案是：7．