wyznacz wzór na a1 ciągu arytmerycznego przekształcając wzór an = a1 + (n-1)r
an = a1 + (n-1)r
an = a1 + rn - r
an - rn + r = a1
a1 = an - r(n - 1)
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Litterarum radices amarae sunt, fructus iucundiores
Pozdrawiam :)
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an = a1 + (n-1)r
an = a1 + rn - r
an - rn + r = a1
a1 = an - r(n - 1)
----------------------------------------------------------------------------------------------------
Litterarum radices amarae sunt, fructus iucundiores
Pozdrawiam :)