107 sats \ 2 replies \ @Undisciplined 24 Sep \ on: [Daily puzzle] \sum_0^{120} \frac{1}{\sqrt{n+1}+\sqrt{n}} = ? charts_and_numbers
10
Rationalize the denominator and then you get a telescoping series.
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33 sats \ 1 reply \ @south_korea_ln OP 24 Sep
You must have made a small mistake in the cancellations... but telescoping series is correct indeed.
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0 sats \ 0 replies \ @Undisciplined 24 Sep
You're right. I was doing it in my head and I started at 1 instead of 0, for some reason.
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