EDB — 28T

Exercises

1. [28T]Prove that multiplication is commutative. Hint prove by induction in \(n\)

   \[ \forall m,n∈ ℕ , (m+1)\times n=m\times n + n\quad , \]

   then reason as in Prop. [27P]↺↻.

   Solution 1

   [28W]↺↻