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Let A={(x,y):y=e^(x) , x in R } B={(x,y...

Let `A={(x,y):y=e^(x) , x in R } B={(x,y),Y=e^(-x) ,x in R}`then

A

`AcapB ne phi`

B

`AuuB=R`

C

`AcapB=phi`

D

none

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