A : (1+i)^(6)+(1-i)^(6)=0 R : If n is ...

A : `(1+i)^(6)+(1-i)^(6)=0`
R : If n is a positive integer then `(1+i)^(n)+(1-i)^(n)=2^((n//2)+1).cos""(npi)/(4)`

Both A and R are true and R is the correct explanation of A

Both A and B are true but R is not correct explanation of A

A is true but R is false

A is false but R is true

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Assertion (A) : (sqrt3+i)^6+(sqrt3-i)^6=-128 Reason (R) : If n is a positive integer then (sqrt3+i)^n+(sqrt3-i)^n=2^(n+1)cos(npi)/(6)

Both A and R are true R is correct explanation to A

Both A and R are true but R is not correct explanation to A

A is true R is false

A is false R is true

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

`(n (n+1) (n+2) )/( 6)`

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

`(n(n+1) (2n+1))/(6)`

`2^n`

`2^(n-1)`

`2^(n+1)`