Answer
$46,438$
Work Step by Step
Plugging in this summation into a calculator, we get:
\[ \sum_{j=7}^{20} j^2(1+j) = 46,438 \]
Precalculus: Mathematics for Calculus, 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305071751
ISBN 13:
978-1-30507-175-9
Chapter 12 - Section 12.1 - Sequences and Summation Notation - 12.1 Exercises - Page 851: 57
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