Question

Write the sum using summation notation, assuming the suggested pattern continues.

729 + 1000 + 1331 + 1728 + ... + n3

Answer 1

@agent0smith

Answer 2

\[\sum_{r=9}^{n}r^{3}\]

Answer 3

They tell you it's n^3 at the end\[\Large \sum_{k=???}^{k = n} n^3\]

Find the ???... what number cubed is equal to 729?

Answer 4

@melacho : Now, why don't we try to extend this further? What is the sum of this series when n=80?

Answer 5

k=9? @agent0smith