Oblicz (licz sprytnie)
_____________
Jest to jedno działanie !
7² + 7 49 + 7 56 112
-------- = -------- = ------- = ------- = 1,12
7² + 1 49 + 1 50 100
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7² + 7 49 + 7 56 112
-------- = -------- = ------- = ------- = 1,12
7² + 1 49 + 1 50 100