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Potironette · 08:37 PM

Doing it that way looks a lot cleaner!

Err, I don't know what the closed form of the sum means, but the exact question was: "Find the four partial sums and the nth partial sum of the sequence a_n." Then I was given a_n = 1/(n+1) - 1/(n+2).
I haven't learned techniques for anything complicated though.

I barely know what a "partial sum" is since class ended the moment it was introduced. The previous question had been "Find the four partial sums and the nth partial sum of the sequence a_n" and I was given a_n = 2/3_n. I sort of gave up on finding the partial sum, so I turned to the answer key (which only answers odd questions) and it said "2/3, 8/9, 26/27, 80/81; S_n = 1 - 1/3" so I assumed the "partial sum" was basically an equation for whatever the sequence of partial sums was like.

Potironette petite fantaisiste			#299
	Doing it that way looks a lot cleaner! Err, I don't know what the closed form of the sum means, but the exact question was: "Find the four partial sums and the nth partial sum of the sequence a_n." Then I was given a_n = 1/(n+1) - 1/(n+2). I haven't learned techniques for anything complicated though. I barely know what a "partial sum" is since class ended the moment it was introduced. The previous question had been "Find the four partial sums and the nth partial sum of the sequence a_n" and I was given a_n = 2/3_n. I sort of gave up on finding the partial sum, so I turned to the answer key (which only answers odd questions) and it said "2/3, 8/9, 26/27, 80/81; S_n = 1 - 1/3" so I assumed the "partial sum" was basically an equation for whatever the sequence of partial sums was like. Last edited by Potironette; 04-04-2017 at 08:37 PM.
		Posted 04-04-2017, 08:35 PM