Răspunsuri

2014-09-28T13:59:40+03:00
X+2x+3x+4x+5x...100x=5050
5050x=5050
x=5050/5050
x=1
Solutia:(x=1)
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2014-09-28T14:01:58+03:00
X(1+2+3+4....+100)=5050
1+2+3+4+....+100=100*101:2=5050
5050*x=5050
x=1
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