exam1_sol

# exam1_sol - Math 250 Fdl 2007 Exa,nr I K"l 5 ofl\1"^ NAME...

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'.. 5 o fl""\1 "^" K"l Math 250 Fdl 2007 Exa,nr I NAME: ID'No: SECTION: This ocam contains l0 questions on g pages (including this title page). This exa,nr is worth a totd of 100 points. The exasr is broken into two parts. There are six multiple choice questions, each worth 5 points, aud 4 partial credit problems. To receive full oedit for a partial credit problem all work must be shown. When in doubt. fill in the details. No notes, books or calculators may be used during the exam. Please, Box Your Final Answer (when possible). 1: B 2: c-. 3: L 4: A 5: A 6: s 7: 8: 9: 10: Total:

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Multiple Cholce Section L, (5 pointE)Determine tbe order and linearity of the differential equa. tion: (y')'+ein(t!/ -a=t8. (a) Fint order and linear. irst order and nonlinear. (c) Second order and linear. (d) Second order and nonlinear. 2. (5 pints) Which of the following will be an integrating factor for the differential equation ty' + (t *2\y : ft DO NOT attempt to solve this differential equation. (a) ef * ezt. (b) e*+zt. q t+\ ,. t-t t =8_ (t\ --t-?) u({ =- t+ \v' _QLL. v (d) t2 + et.
g. (5 pints) Find the maximal intenal where tbe existence and ness of tbe solution to the iuitial value problem is guaraoteed: ln(t)y'+ tau(t)y : Bin2(t), , (;) = -t. unique

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## This note was uploaded on 05/17/2008 for the course MATH 250 taught by Professor Gyrya,vitaliy during the Fall '07 term at Penn State.

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exam1_sol - Math 250 Fdl 2007 Exa,nr I K"l 5 ofl\1"^ NAME...

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