Question

How many positive integers N ≤ 1000 are there, such that \(\bf 3^{N}-N^{3}\) is a multiple of 5?

Answer 1

helllllllllllllllo?

Answer 2

200

Answer 3

@Zarkon how do u know

Answer 4

show that 3^n-n^3
is equal to
3^(n+20)-(n+20)^3
mod 5

Answer 5

@Zarkon Pls explain

Answer 6

@Zarkon ???