Sequences and series Flashcards
1
Q
arithmetic nth term
A
un = a + (n-1)d
2
Q
arithmetic sum formula
A
Sn = n/2(2a + (n-1)d)
3
Q
geometric nth term
A
an = ar^n-1
4
Q
geometric sum formula
A
Sn = a(1-r^n)/1-r
5
Q
geometric infinity sum formula
A
a/1-r
