Answer
=$0.537$
Work Step by Step
$\int^3_1xe^{-x}dx$
=$-(x+1)e^{-x}]^3_1$
=$-4e^{-3}+2e^{-1}$=$0.537$
Thomas' Calculus 13th Edition
by Thomas Jr., George B.
Published by
Pearson
ISBN 10:
0-32187-896-5
ISBN 13:
978-0-32187-896-0
Chapter 8: Techniques of Integration - Section 8.9 - Probability - Exercises 8.9 - Page 514: 11
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