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Ajutoooooooooooor
Cum fac 1×2×3×4×...×50


Răspuns :

E suma Gauss: 1+2+3+...+n= n(n+1)/2 N e ultimul numar In cazul tau 50 e n deci 50(50+1)/2= 50x51:2 si faci calculul
S=[(T1+Tultim)•nr termeni]:2
S=[(1+50)•50]:2
S=(51•50):2
S=2550:2
S=1275