(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

2. Relevant equations

The question is related to Riemann Sums

3. The attempt at a solution

I can not understand the notation of the question.

Can someone explain the question to me.

Or solve the question, i will understand it myself.

Thanks

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# Help with notation.

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