Unformatted text preview: π x x . (8 points) 3. Solve: ( 29 xy x dx dy x 8 2 4 2= + 4. Solve: xy y dx dy x= 2 5. Solve the Bernoulli equation: 2 5 y y y + = ′ 6. Solve: ( 29 2 2 = + + dy x dx yx y 7. Solve the “almost exact” equation: ( 29 9 4 6 2 = + + dy x y dx xy 8. A large tank is filled with 500 gallons of pure water. Brine containing 2 pounds of salt per gallon is pumped into the tank at a rate of 10 gal/min. The wellmixed solution is pumped out of tank at a rate of 5 gal/min. Find the number ) ( t A of pounds of salt in the tank at time t . 9. Use reduction of order to find the general solution of the differential equation 9 = + ′ ′ y y given that x y 3 sin 1 = is a solution....
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 Fall '10
 PamelaSatterfield
 Differential Equations, Equations

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