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10 cards from this deck
A list of numbers
The nnnth term of a sequence
Constant difference between consecutive terms (arithmetic)
Constant factor between consecutive terms (geometric)
Sum of the terms of a sequence
Sn=n2(2a+(n−1)d)S_n = \frac{n}{2}(2a + (n-1)d)Sn=2n(2a+(n−1)d)
Sn=a1−rn1−rS_n = a\frac{1-r^n}{1-r}Sn=a1−r1−rn
S=a1−rS = \frac{a}{1-r}S=1−ra when ∣r∣<1|r| < 1∣r∣<1
Infinite series approaching a finite value
Sum terms aia_iai from i=1i=1i=1 to nnn
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