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10 cards from this deck
Sequence with constant difference between consecutive terms
Constant difference between consecutive terms in arithmetic sequence
First term
Common difference
The nth term of the sequence
a,a+d,a+2d,a+3d,…a, a+d, a+2d, a+3d, \ldotsa,a+d,a+2d,a+3d,…
an=a+(n−1)da_n = a + (n-1)dan=a+(n−1)d
Sn=n2(2a+(n−1)d)S_n = \frac{n}{2}(2a + (n-1)d)Sn=2n(2a+(n−1)d)
Sn=n2(a+an)S_n = \frac{n}{2}(a + a_n)Sn=2n(a+an)
Sum of terms in an arithmetic sequence
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