Series And Sequences

Question 1

Arithmetic sequence formula

Answer 1

U n = a +(n-1)d

Question 2

Sum of an arithmetic series formula

Answer 2

S n = n/2 (2a +(n-1)d)

Question 3

Geometric sequence formula

Answer 3

U n = ar^(n-1)

Question 4

Sum of a geometric series

Answer 4

S n = (a(1-r^n)) / (1-r)