Denisa269ask
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Calculati suma: S= (96,34+X) + (86,34+X) +....+ (16,34+X) , UNDE X= 3,66

Răspuns :

Miky93ask
S=(96,34+3,66)+(86,34+3,66)+....+(16,34+3,66)

S=100+90+.....+20

S=(100+20)*9/2

S=120*9/2

S=60*9

S=540
Uvgguvgugguvguask
S= (96,34+X) + (86,34+X) +....+ (16,34+X)
S=(96,34+3,66) + (86,34+3,66) +....+ (16,34+3,66)
S=100+90+....+20
S=20+30+...+100 (sunt invers)          (100-20):10+1=80:10+1=8+1=9(nr)
2S=120+120+....+120
2S=120*9
S=60*9
S=540

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