In an arithmetic sequence where the first three terms are 3, 7, 11, find the sum of the first 100 terms.
In an arithmetic sequence where the first three terms are 3, 7, 11, find the sum of the first 100 terms.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Question
In an arithmetic sequence where the first three terms are 3, 7, 11, find the sum of the first 100 terms.
Expert Solution
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Step 1
We know, in an arithmetic sequence, the sum of n terms:
Sn = (n/2)* [2a + (n-1)*d]
Where, a = first term
d = common difference
n = number of terms.
Step by step
Solved in 2 steps
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