anonymous
  • anonymous
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Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
how would that helpme? there is nothing about algebra there @whoperman28
anonymous
  • anonymous
sort of..
anonymous
  • anonymous
okay and what is n

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anonymous
  • anonymous
okay, so now what do we do
anonymous
  • anonymous
wait where did the 5 come from?
UnkleRhaukus
  • UnkleRhaukus
The formula for the sum of a finite Arithmetic series is \[S_n = \frac n2(s_0+s_n)\] where \(s_1\) is the first term, \(s_n\) is the last term, and \(m\) is the number of terms
anonymous
  • anonymous
okay
anonymous
  • anonymous
now what?
anonymous
  • anonymous
someone please its 2am im so tireddd
anonymous
  • anonymous
omg please help wolf my back is killing me i never want to see this laptop ever again
wolf1728
  • wolf1728
Okay here it is explained a little easier. The sum of consecutive integers from 1 to 100 would be n*(n+1) /2 = 100 * 101 /2 = 5,050 Let's suppose you have to sum 11 to 100? We know 1 to 100 = 5,050 So, to sum 11 to 100 we would have to subtract sum of 1 to 10 10 * 11 /2= 110 / 2 =55 SO, sum of 11to 100 equals 5,050 MINUS 55 = 4,995
wolf1728
  • wolf1728
SO, you have to sum 5 through 11 using the formula? sum of 1 to 11 = 11 * 12 / 2 = 66 sum of 1 to 4 = 4 *5/2 = 10 66 - 10 = 56
anonymous
  • anonymous
@wolf1728 so is that the entire anser? and that is simple lol??
anonymous
  • anonymous
@wolf1728 ahhhhhhhhhhhhhhhhhhhhhhhhhhh
wolf1728
  • wolf1728
Yes that is it. As you probably know you could just as easily add up 5+ 6+ 7+ 8+ 9+ 10+ 11 using pencil and paper but I guess they just want you to get familiar with formulas.
anonymous
  • anonymous
lol wow. okay thnk you

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