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Unformatted text preview: Math 20D, Lecture C, Winter 2006 24 February 2006 Quiz 4, version B Name: ID #: Section Time: Show all work clearly and in order, and circle your final answers. You have 20 minutes to take this 25 point quiz. 1. [ 8 points ] Approximate the sum of the following series using the first 3 terms of the partial sum. Estimate the error involved in this approximation (i.e. tell me s = a error, or m s M , where s is the true sum of the infinite series). If using a calculator, only give the answer to 4 decimal places. X n =1 3 n 6 Solution: The partial sum using the first 3 terms is (2 pts) s 3 = 3 X n =1 3 n 6 = 3 + 3 64 + 3 729 = 142347 46656 3 . 050990 . Using the integral remainder test, we know that the error in approximating s with s 3 , i.e. R 3 = s s 3 , satisfies the following estimate (3 pts setup): s s 3 Z 3 3 x 6 dx s s 3  3 5 x 5 3 s s 3  0 + 3 5(3 5 ) s s 3 1 405 ....
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This note was uploaded on 06/12/2008 for the course MATH 20D taught by Professor Mohanty during the Spring '06 term at UCSD.
 Spring '06
 Mohanty
 Math

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