URGENT PLEASE In problems 2 3 use the following Venn diagram

URGENT PLEASE

In problems 2 &3 use the following Venn diagram for your answers: 72 3

Solution

3.

(a+b)+c=a+(b+c)

Equation is alway true

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                     (a+b)+c-(a+(b+c))=0

Step  1  :

Equations which are always true :

1.1    Solve   0  = 0This equation is a tautology (Something which is always true)