anonymous
  • anonymous
Find the sum of a finite arithmetic sequence from n = 1 to n = 15, using the expression 2n + 5. 315 215 32 35
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
@dan815
anonymous
  • anonymous
@welshfella
anonymous
  • anonymous
Please help! Ill give medals and become fan

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

anonymous
  • anonymous
what is the first term, when \(n=1\)?
anonymous
  • anonymous
I dont know
anonymous
  • anonymous
really?
anonymous
  • anonymous
replace \(n\) by \(1\) in \(2n+5\)
anonymous
  • anonymous
so its 7?
anonymous
  • anonymous
yes now hold that number
anonymous
  • anonymous
what is \(2n+5\) if \(n=15\)?
anonymous
  • anonymous
35?
anonymous
  • anonymous
yes
anonymous
  • anonymous
Is that the final answer?
anonymous
  • anonymous
formula you are going to use is \[\frac{n}{2}(a_1+a_n)\] you have \(a_1=7,a_{15}=35\)
anonymous
  • anonymous
what is\(7+35\)?
anonymous
  • anonymous
Its 42
anonymous
  • anonymous
ok so we are at \[\frac{15}{2}(42)\]
anonymous
  • anonymous
divide 42 by 2, then multiply the result by 15
anonymous
  • anonymous
Its 315

Looking for something else?

Not the answer you are looking for? Search for more explanations.