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1. The first term of a sequence is 13. Starting with the second term, each term is the sum of the cubes of the digits in the previous term. For example, the second term is 1^3 + 3^3 = 28. Find the 100th term.

 

2. The sum of the first n terms of a certain sequence is n(n + 1)(n + 2). Find the tenth term of the sequence.

 

Thanks in advance :)

 Feb 15, 2021
 #1
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1) If you start writing out the next terms of the pattern, you'll see that, well, there is a pattern.

 

13, 28, 520, 133, 55, 250, 133...

 

The 100th term would be 133. 

 

2) I think it was answered here --> https://web2.0calc.com/questions/help_15462

 Feb 15, 2021

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