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## Homework Statement

[tex] \sum_{i=1}^{n} (i \prod_{j=1}^{i}_{j}) = \prod_{i=1}^{n+1}_{i} - 1 [/tex]

## Homework Equations

## The Attempt at a Solution

First show the base case. That easys just shows it holds for n=1. Not sure where to go from there? What term do I add to both sides? Not really sure what the i means in front of the [tex]\prod [/tex] on the left side