Question

if (-1)^n+(-1)^4n=0 then n is (a) negative integer (b) positive integer​

Answer 1

Answer:

(−1)  

n

=−1 only when n is odd

Now, 4n will always be an even integer because it is a multiple of 2 i.e. (2×2n).

So (−1)  

4n

 will be equal to 1.

Therefore it will be any odd natural number