anonymous
  • anonymous
How do you do a problem like this? We haven't done this in my class yet. I'm just trying to get a head start.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
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anonymous
  • anonymous
do you know how to do combinatorics?
anonymous
  • anonymous
nope lol

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anonymous
  • anonymous
This is called Series. |dw:1333314901549:dw| This is basically what you do. You start at 1 as indicated below the sigma sign (the pointy E sign). Sub in 1 for k and then sub in 2 for k, adding the terms as you go along. Stop at 5 since it's written at the top of the sigma sign. Do you kind of understand? My explanation isn't too great but hopefully by the picture you'll get it?
anonymous
  • anonymous
yeah, i understand. :D thanks!
anonymous
  • anonymous
what about one that doesnt have an X to plu things into?
anonymous
  • anonymous
*plug
anonymous
  • anonymous
like?
anonymous
  • anonymous
(127 S k=11) 6
anonymous
  • anonymous
the 127 is on the sigma and the k=11 is below it and the 6 is next to
anonymous
  • anonymous
it
anonymous
  • anonymous
\[\sum_{k=11}^{127} 6\]
anonymous
  • anonymous
this?
anonymous
  • anonymous
yes
anonymous
  • anonymous
My book says \[\sum_{i=1}^{10} i = 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10\]
anonymous
  • anonymous
your example isnt making sense to me
anonymous
  • anonymous
well thats what i have to solve
anonymous
  • anonymous
Here
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anonymous
  • anonymous
I think, and I'm not too sure, but I think the answer is just 6 seeing as you can't sub anything into it. I'll have a look around. I know I saw something like this before.
anonymous
  • anonymous
anonymous
  • anonymous
can you see it?
anonymous
  • anonymous
yes i see the link
anonymous
  • anonymous
if your k was equal to 1 it would be easy to solve... but 11? I don't get it
anonymous
  • anonymous
ok so this is how you do it: (127-11)+1=117 117*6=702 702 is the final answer
anonymous
  • anonymous
mmm weird
anonymous
  • anonymous
you subtract 11 and add 1 so k=1 like the other problems

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