Suma numerelor : 0+1+2+3+4+5+6+7+8+9+......+47+48+49 poate fi calculata foarte simplu cu ajutorul formulei n(n+1) / 2= 49(49+1)/2= (49 * 50 )/ 2= 2450/ 2 =1225
SE FOLOSESTE FORMULA SUMELOR GAUSS

Răspunsuri

2014-07-02T16:43:36+03:00
0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+.................+39+40+41+42+43+44+45+46+47+48+49=1225
1 5 1
2014-07-02T16:52:23+03:00
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+ 50=
3+7+11+15+19+23+27+31+35+39+43+47+51+55+59+63+67+71+75+79+83+87+91+97+50=10+26+42+58+74+90+106+112+138+154+170+188+50=
=36+100+164+218+292+358+50=

=136+382+  650+50
=  518+650+50=518+700=1218