Cristina1287ask
a fost răspuns

Calculati suma :

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

Multumesc !

Răspuns :

Red12dog34ask
[tex]96,34+x=96,34+3,66=100[/tex]
[tex]86+x=90[/tex]
................................
[tex]16,34+x=20[/tex]
Deci suma este
[tex]100+90+80+\ldots+20=10(1+2+\ldots+10-1)=\\=10\left(\displaystyle \frac{11\cdot10}{2}-1\right)=10(55-1)=540[/tex]

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