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Casian550
a fost răspuns

calculati a^2 si a^3 unde a= (1+0.1)+(1+0.2)+...+(1+0.9)

Răspuns :

Alitta
a=(11+12+13+...+19)/10 =
  =[(11+19)+(12+18)+(13+17)+(14+16)+15]/10=(4*30+15)/10=135/10=13,5
      =>    a^2=13,5*13,5=182,25 
       si     a^3=a^2*a=182,25*13,5=2460,375