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anonymous
 5 years ago
Find the indicated nth partial sum of the arithmetic sequence.
1.6, 4.2, 6.8, 9.4, ..., n = 50
anonymous
 5 years ago
Find the indicated nth partial sum of the arithmetic sequence. 1.6, 4.2, 6.8, 9.4, ..., n = 50

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0The nth term = dn + c. I think I use this to solve but when I do none of my answers match up with my choices

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0and yes 2.6 is the common difference (d)

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.01.6 + 2.6(n) ?? think I am wrong...

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0my answer choices are: A. 2090 B.3395 C.3265 D.3266 E.3264

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0would it not be 1.6+2.6(n1) ?? Remembering that you start at n=1

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0math: thats what I thought, but doubted myself....

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Well thats what I was doing but as you can see none of my answer choices match that answer

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0that's because you are looking for the sum of the terms up o the 50th term

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0ohhhh wow silly me so I have to go back and add them all up.... sorry about that

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0the idea of the question i assume is for you to find the formula which does the sumation for you

amistre64
 5 years ago
Best ResponseYou've already chosen the best response.0can you do that with an integral of the equation?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0i think to find n, you could use 50=n/2 (1.6+(n1)2.6)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no because that would find the area under an axis of real numbers whereas you are looking to sum natural numbers

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0\[s \left[ n \right]=n\2(a \left[ 1 \right]+a \left[ n \right])\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no I don't think that is right either.....

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0no its not, keep trying though

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Just kidding I figured it out the answer is c

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.01.6+49(2.6)=129 50/2(1.6+129)=3265

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh i see what you meant now by your notation! My mistake, well done :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0do any of you know or understand how to figure out a problem like this: Find the sum of the infinite series: \[\sum_{i=1}^{\infty}2(1/4)^i\]

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0Thanks It took me a sec to think through it and figure it out lol maybe if I had originally read the question better lol :)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0if i remember correctly there is a formula for the sum of an infinite series, first take 2 out as it is a constant and then apply the formula, (try wikipedia for it because i cannot be sure of my memory). As 1<r<1 you can use the formula where r=1/4
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