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An arithmetic sequence is given by the formula Ln= 42+11n. Find the sum of the first 2000 terms of this sequence. What is the first term in this sum? first term = What is the last term in this sum? last
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An arithmetic sequence is given by the formula Ln= 42+11n.

Find the sum of the first 2000 terms of this sequence.

What is the first term in this sum?
first term =


What is the last term in this sum?
last term =


What is the sum?
sum =

User Lars Pellarin
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1 Answer

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First term = 42 + 11 x 1 = 53
Last term = 42 + 11 x 2000 = 22042
Sum of 2000 terms = (2000/2)(53 + 22042) = 1000 x 22095 = 22 095 000
User Daimajia
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