23. Use MATLAB to show that the sum of the infinite series converges to 6. Do this by computing the sum for

(a) ,

(b) , (c)

For each part, create a vector n in which the first element is 1, the increment is 1 and the last term is 5, 15, or 30. Then use element-by-element calculations to create a vector in which the elements are . Finally, use MATLAB’s built-in function sum to sum the series. Use format long to display the numbers.