Question

if a,b, c are three rational numbers where a=2/3,b=4/5and c=-5/6. verify; a+(b+c) =(a+b) + c​

Answer 1

Answer:

a+b=22/15

b+c=-1/30

a+c=-3/18

a+(b+c)

=2/3+(1/30)

=63/90

And

(a+b) +c

=(22/15)+-5/6

=(22/15)-5/6

=13/90

So,(a+b)+c is not equal to the a+(b+c)