Question

Write the sum using summation notation, assuming the suggested pattern continues. 729 + 1000 + 1331 + 1728 + ... + n3

Answer 1

Each term of the sum is n³

The first term of the sum is 729, then:

n³=729

cubic root (n³)=cubic root (729)

n=9, then the first term of the sum is for n=9

Then the sum is :

Sum from k=9 to n of k³

sum limits^n_9 {k³ }