Răspunsuri

2014-11-01T12:34:22+02:00
Notam numerele
(2a+1),(2a+3).(2a+5),(2a+7),(2a+9)
2a+1+2a+3+2a+5+2a+7+2a+9=10a+25
10a+25=105
10a=105-25
10a=80
a=80/10
a=8
de aici rezulta ca numerele sunt:
2a+1=2*8+1=17
2a+3=2*8+3=19
2a+5=2*8+5=21
2a+7=2*8+7=23
2a+9=2*8+9=25
2014-11-01T12:58:24+02:00
Notam cu a numarul natural .

2a+1+2a+3+2a+5+2a+7+2a+9 = 105 \\ 10a + 25 = 105 ==> 10a = 80  \\ a=8

In concluzie numerele cautate sunt : 17,19,21,23,25 !
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