Răspuns :
R=1
T1=2 Tn=50
Tn=T1+(n+1)*r
50=2+(n+1)*1
50-2=n+1
48-1=n
N=47
S=(T1+T47)*50:2
=(2+50)*25
52*25=1300
Bafta!
T1=2 Tn=50
Tn=T1+(n+1)*r
50=2+(n+1)*1
50-2=n+1
48-1=n
N=47
S=(T1+T47)*50:2
=(2+50)*25
52*25=1300
Bafta!