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Let A1,A2 and A3 be the region on R^2 de...

Let `A_1,A_2` and `A_3` be the region on `R^2` defined by `A_1={(x,y):xge0,yge0,2x+2y-x^2-y^2>1>x+y}`,`A_2={(x,y):xge0,yge0,x+y>1>x^2+y^2}`,`A_3={(x,y):xge0,yge0,x+y>1>x^3+y^3}`. Denote by `|A_1|`,`|A_2|`, and `|A_3|` respectively. Then

A

`|A_1|gt|A_2|gt|A_3|`

B

`|A_1|gt|A_3|gt|A_2|`

C

`|A_1|=|A_2|gt|A_3|`

D

`|A_1|=|A_3|gt|A_2|`

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