The value of 2 + 4 + 6 + ….+ 2n is

If sqrt(2^(n))=64, then the value of n is 2 b.4 c.6 d.12

If u_(n) = cos^(n) alpha + sin^(n) alpha , then the value of 2 u_(6) - 3 u_(4) +1 is :

Prove that 2 + 4 + 6 + .... + 2n = n (n + 1)

Assertion : For Balmer series of hydrogen spectrum, the value n_(1)=2 and n_(2)=3,4,5 . Reason : The value of n for a line in Balmer series of hydrogen spectrum having the highest wave length is 4 and 6 .

Assertion : For Balmer series of hydrogen spectrum, the value n_(1)=2 and n_(2)=3,4,5 . Reason : The value of n for a line in Balmer series of hydrogen spectrum having the highest wave length is 4 and 6 .

Find the value of n, where n is an integer and 2^(n-5)xx6^(2n-4)=1/(12^(4)xx2)

If n is an odd positive integer then the value of (1+ i^(2n) + i^(4n) + i^(6n) ) ?