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2014-10-14T16:37:07+03:00
(1+2+3+.............+100):x=101
Aplicam suma lui Gauss si relatia devine:
100*101:2=101*x
x=50*101/101=50
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2014-10-14T16:44:00+03:00
1+2+3+....+100= \frac{100(100+1)}{2}

( \frac{100·101}{2} ):X=101
se simplifica 2 cu 100, ramanand la numitor (50·101):X=101
X= \frac{101}{50·101}
se imparte 101 la 101=1 ⇒ X= \frac{1}{50}
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