Answer
30
Work Step by Step
$$\sum_{k=1}^{n} k^2$$
Sum of first four terms would be when n = 4.
$$\sum_{k=1}^{4} k^2= 1^2 + 2 ^2 + 3^3 + 4^4 = 1 + 4 + 9 + 16 = 30$$
Calculus: Early Transcendentals (2nd Edition)
by Briggs, Bill L.; Cochran, Lyle; Gillett, Bernard
Published by
Pearson
ISBN 10:
0321947347
ISBN 13:
978-0-32194-734-5
Chapter 8 - Sequences and Infinite Series - 8.1 An Overview - 8.1 Exercises - Page 604: 7
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