Roberto Roni
11/07/2018 • 19:42
a3=a1+2r e a6=a1+5r
2a1+7r=29
a2=a1+1r e a5=a1+4r
2a1+5r=23
2a1+7r=29
2a1+5r=23 . (-1)
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/// 2r=26 → r=13
2a1+7r=29
a2=a1+1r e a5=a1+4r
2a1+5r=23
2a1+7r=29
2a1+5r=23 . (-1)
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/// 2r=26 → r=13