Series Flashcards
1
Q
Arithmetic nth term
A
Un = a + (n-1)d
2
Q
Arithmetic sum (F)
A
Sn = n/2 x (2a+(n-1)d)
3
Q
Geometric nth term
A
Un = ar^(n-1)
4
Q
Geometric sum (F)
A
Sn = [a(1-r^n)] / [1-r]
5
Q
Geometric sum to infinity (F)
A
a/(1-r)
