Numerele y1,y2,...,yn sunt in progresie geometrica.Sa se determine numarul acestora daca:

a) y1=3,yn=96,Sn=189
B)y1=2,yn=1/8,Sn=31/8
c)y1=1,yn=-512, Sn=-341
d)yn=96,q=2,Sn=189