Răspunsuri

2014-08-04T17:24:13+03:00
1)S=2(1+2+3+.....+100)=

=2*(1+100)*100/2=

=(1+100)*100=

=101*100= 10100

2)S=(1+2+3+...+99)=

=(1+99)*99/2=

=100*99/2=

=50*99=  4950
pardon, Miky93 a facut f bine,
ca Miky1301 a gresit...
:))
zambesti, huh?
poate ;) :))