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Differential Equations 3 Mark Creative Question Paper With Answer Key

12th Standard

    Reg.No. :
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Business Maths

Time : 00:45:00 Hrs
Total Marks : 45

     3 Marks

    15 x 3 = 45
  1. Form the differential equation by eliminating α and β from (x − α)2 + (y − β)2 = r2

  2. Find the differential equation of the family of all straight lines passing through the origin.

  3. Form the differential equation that represents all parabolas each of which has a latus rectum 4a and whose axes are parallel to the x axis.

  4. Find the differential equation of all circles passing through the origin and having their centers on the y axis.

  5. Find the differential equation of the family of parabola with foci at the origin and axis along the x-axis.

  6. Find the differential equation of the family of curves y = ex (acos x + bsin x) where a and b are arbitrary constants.

  7. Find the differential equation of the family of curves \(y=\frac { a }{ x } +b\) where a and b are arbitrary constants

  8. Find the differential equation corresponding to y = ae4x + be−x where a, b are arbitrary constants.

  9. Solve \(\frac { dy }{ dx } \) = ex−y+ x2e− y

  10. Solve sec2x tan y dx + sec2y tan x dy = 0

  11. Solve \(y d x-x d y-3 x^{2} y^{2} e^{x^{3}} d x=0\)

  12. The marginal cost function of manufacturing x gloves is 6 + 10x − 6x2. The total  cost of producing a pair of gloves is Rs. 100. Find the total and average cost function.

  13. Solve: \(\frac { dy }{ dx } ={ ae }^{ y }\)

  14. Solve: y(1 - x) - x\(\frac{dy}{dx}\) = 0

  15. Solve: cosx(1 + cos y)dx − sin y(1 + sin x)dy = 0

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