Question

(1supra2-1supra3)+(1supra4-1supra5)+(1supra5+1supra6)

Answer 1

(1/2-1/3)+(1/4-1/5)+(1/5-1/6)=
(30/60-20/60)+(15/60-12/60)+(12/60-10/60)= 10/60+3/60+2/60=15/60= 1/4

Answer 2

1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6
3\1/2-1/6=3/6-1/6
=2/6
{\}=ridicat la putere

Așa cred eu ca trebuie sa fie problema.