anonymous
  • anonymous
medal will be awarded Find the sum of the summation of 3 i plus 2, from i equals 5 to 13
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
im confused
anonymous
  • anonymous
answer choices 261 41 220 38
kropot72
  • kropot72
This question can be treated a an arithmetic series, with the first term being 15 + 2, the last term being 39 + 2, and the number of terms being 13 - 5 = 9. The required formula is \[\large S=\frac{n}{2}(a+L)\] where S is the sum of n terms, a is the first term and L is the last term.

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anonymous
  • anonymous
the first term is 13 and last term is 5 and the sum of terms 3i+2
kropot72
  • kropot72
No. The first term is found by plugging in the value i = 5 into 3i + 2, giving: First term = (3 * 5) + 2 = 17 The last term is found by plugging in the value i = 13 into 3i + 2, giving: Last term = (3 * 13) + 2 = 41 Do you understand?
anonymous
  • anonymous
yes can u answer another question
anonymous
  • anonymous
What is the rate of change between the interval of x = pi over 4 and x = pi over two
kropot72
  • kropot72
Good. Please post your other question as a new question, the reason being that I must log out now.
anonymous
  • anonymous
ok

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