Question

I need it within tomorrow please

Answer 1

Any even number raised to any power will remain even. (e.g. 2² = 4, 2³ = 8, etc)

Any odd number raised to any power will remain odd. (e.g. 1² = 1³ = ... = 1, 3⁴ = 81, etc)

So $(n+1)^{2^k}-n^{2^k}$ will always be even, since both

[even] - [odd] = [odd]

and

[odd] - [even] = [odd]