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12 cards from this deck
A formula to find any term in a sequence directly
The nth term formula
The position number of the term
Same amount added between consecutive terms
Find the common difference
dndndn
dn+(a−d)dn + (a - d)dn+(a−d)
a+(n−1)da + (n - 1)da+(n−1)d
The common difference
111
4n−14n - 14n−1
Tn=dn±constantT_n = dn ± \text{constant}Tn=dn±constant
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