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You must have made a small mistake in the cancellations... but telescoping series is correct indeed.
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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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You must have made a small mistake in the cancellations... but telescoping series is correct indeed.
You're right. I was doing it in my head and I started at 1 instead of 0, for some reason.
10
Rationalize the denominator and then you get a telescoping series.