#### Answer

30

#### Work Step by Step

$$\sum_{k=1}^{n} k^2$$
Sum of first four terms would be when n = 4.
$$\sum_{k=1}^{4} k^2= 1^2 + 2 ^2 + 3^3 + 4^4 = 1 + 4 + 9 + 16 = 30$$

Published by
Pearson

ISBN 10:
0321947347

ISBN 13:
978-0-32194-734-5

30

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