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 February 9th, 2019, 10:12 AM #1 Senior Member   Joined: Dec 2015 From: iPhone Posts: 387 Thanks: 61 Expression problem Does this make sense ? $\displaystyle n=\sum_{k=1}^{n} \frac{k}{k}$ . It is same as 1+1+1+... , n-times but the expression inside the sum is 1 .
 February 9th, 2019, 11:39 AM #2 Senior Member     Joined: Sep 2015 From: USA Posts: 2,314 Thanks: 1230 I don't see anything wrong with that other than it should be mentioned that $k \neq 0$
 February 9th, 2019, 03:31 PM #3 Global Moderator   Joined: Dec 2006 Posts: 20,298 Thanks: 1971 Possibly $n \geqslant 1$ and $n \in \mathbb{N}$ were also intended. Thanks from idontknow
February 9th, 2019, 03:42 PM   #4
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Quote:
 Originally Posted by romsek I don't see anything wrong with that other than it should be mentioned that $k \neq 0$
actually, duh, that's implied by the series indices

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