2.5
Algebra
Number Theory
Not logged in? Click here to log in.
Divisibility of a Specific Number by 7
Author: SolveSheep
Prove by induction that for any natural number \( n \), the number \( N_n = 11 \cdot 10^{2n} + 10^{n+1} + 1 \) is divisible by 7.
Not logged in? Click here to log in.