Sequences & Series Flashcards
1
Q
Arithmetic series
A
U{n} = a + (n-1)d
2
Q
Geometric series
A
U{n} = ar^(n-1)
3
Q
Geometric sum
A
S{n} = a(1-r^n) / (1-r)
4
Q
Arithmetric sum
A
S{n} = 0.5n[2a + (n-1)d]
S{n} = 0.5n(a+l)
5
Q
Geometric sum to infinity
A
S{n} = a/(1-r)
|r| < 1
