Find the exponent kkk such that 3k≡1(mod2n)3^k \equiv 1 \pmod{2^n}3k≡1(mod2n) is impossible for any n≥3n \geq 3n≥3.
kkk must be a power of 222
333 is not a primitive root modulo 2n2^n2n
333 is not coprime to 2n2^n2n
All of the above