望采纳,谢谢啦。
积分区域为:(x-1/2)²+(y-1/2)²≤3/2作换元x'=x-1/2y'=y-1/2此时,积分区域变成D':x'²+y'²≤3/2所以,原式=∫∫[D'](x'+y'+1)dx'dy'=∫∫[D']1dx'dy'【应用奇偶对称性】=3π/2