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Total numbers of regions in which 'n' co...

Total numbers of regions in which 'n' coplanar lines can divide the plane, if it is known that no two lines are parallel and no three of them are concurrent, is equal to

A

`(1)/(2)(n^(2)+n+2)`

B

`(1)/(2)(3n^(2)+n)`

C

`(1)/(2)(3n+n^(2))`

D

`(n^(2)-n+4)`

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The correct Answer is:
A
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