Recent content by jy02354441

  1. J

    Graduate How to prove this congruent proof?

    If a is congruent to b mod n and a^k−1 is congruent to b^k−1 mod n, then a^k is congruent to b^k mod n.? n>0 and k>1 How to prove it by induction?
  2. J

    How to prove that the composition of injection is an injection?

    how to prove it please?