Question

5. Evaluate the series 50 + 10 + 2 + . . . 62 The series diverges; it does not have a sum. 62.5

Answer 1

62.5

Explanation:

By dividing 50 by 10 and 10 by 2 we can find that r, or the common ratio is 1/5, meaning that this series converges, so it is solvable. The formula for a convergent series is
`(a_(1))/(1-r)`. By plugging in 1/5 for r and 50 for
`a_(1)` we can find that the sum of this infinite series is 62.5