Pomożecie? Dany jest nieskończony ciąg arytmetyczny -17, -13,-9,-5, wyznacz 20 wyraz ciągu
a(1) = -17
a(2) = -13
r = a(2) - a(1) = -13 + 17 = 4
a(20) = a1 + 19*r = -17 + 19*4 = -17 + 76 = 59
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a(1) = -17
a(2) = -13
r = a(2) - a(1) = -13 + 17 = 4
a(20) = a1 + 19*r = -17 + 19*4 = -17 + 76 = 59