This formula con be used to sum the consecutive cubes from 1 to n Within your current worksheet, use the above formula to sum all the consecutive cubes from n = 10 through n = 20. Solution sum of cubes from 1 to 20 - sum of cubes from 1 to 10 = sum of cubes from 10 to20 = 20^2 ( 20+1)^2 / 4 - 10^2(10+1)^2/4 = 41075 thus ans.

1. This formula con be used to sum the consecutive cubes from 1 to n Within your current
worksheet, use the above formula to sum all the consecutive cubes from n = 10 through n = 20.
Solution
sum of cubes from 1 to 20 - sum of cubes from 1 to 10
= sum of cubes from 10 to20
= 20^2 ( 20+1)^2 / 4 - 10^2(10+1)^2/4
= 41075
thus ans