W ciągu arytmetycznym
(an)
a₁=-2
r=5
OBLICZ:
a2010=?
an = a₁+(n-1)*r
a2010 = -2 + 2009*5
a2010 = 10043
a2010 = a1 + 2009r
a2010 = -2 + 10045
a2010 = 1043
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an = a₁+(n-1)*r
a2010 = -2 + 2009*5
a2010 = 10043
a2010 = a1 + 2009r
a2010 = -2 + 10045
a2010 = 1043