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Unformatted text preview: x 2 ) y 00xy +4 y = 0 about x = 0. 9. A 1000gallon tank initially contains 200 lbs. of salt dissolved in 600 gallons of water. A brine solution containing 2lbs. of salt per gallon is pumped into the tank at a rate of 3 gal./min. The wellmixed solution is pumped out at a rate of 1 gal./min. How much salt is in the tank when it is full? 10. Express the general solution of t 2 y 00 + ty +4 y = 0 as a linear combination of two realvalued functions, and show that they are linearly independent....
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 Spring '08
 Fonken
 Differential Equations, Equations

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