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State which of the followings are null s...

State which of the followings are null set?

A

`{x in RR: x^2 + 1 =0}`

B

`{x in CC : x gt x}`

C

`{x in RR: x^2 + x = 0 }`

D

`{x in RR:x^2+2=0}`

Text Solution

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The correct Answer is:
A,B
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