podaj wzór ogólny ciągów:
a) 2,4,6,8,10
b) 1, 1/2, 1/7,1/4
c)1,8,27,64,125
a₁=2 r=2
an=2+(n-1)2
an=2-2+2n
an=2n
a₁=1 r=-½
an=1-½n+½=-½n+1½
an=n³
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a) 2,4,6,8,10
a₁=2 r=2
an=2+(n-1)2
an=2-2+2n
an=2n
b) 1, 1/2, 1/7,1/4
a₁=1 r=-½
an=1-½n+½=-½n+1½
c)1,8,27,64,125
an=n³