Question

daca a = 5supra 6 , b+c = 7 supra 20 si c - d = 1 supra 24 , calculati a ori b +2 ori aori c - a ori d

Answer 1

a=5/6  (1)
b+c=7/20  (2)
c-d=1/24  (3)
..........................Daunand (2) si (3) : b+2c-d=7/20+1/24=47/120
Atunci: ab+2ac-ad=a(b+2c-d)=5/6·47/120=...