Addition and Multiplication.

We recall the main properties of addition and multiplication in $ \mathbb{R}$ .

  1. Addition:
  2. Multiplication:
  3. Distributivity:

    $\displaystyle \forall x \in \mathbb{R}, \forall y \in \mathbb{R}, \forall z \in \mathbb{R}, x(y+z)=xy+xz \;$   and$\displaystyle \; (x+y)z=xz+yz.$    

Noah Dana-Picard 2007-12-28