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  1. I need help with this problem....
  2. Free response question for AP calc.: f = sqrt[1 - sinx]
  3. Help: figure out fourth constraint
  4. linear equations
  5. one train goes west at 130 kph. 3 hrs later, another....
  6. Area of the Region
  7. Problems with equations
  8. word problem for medical math
  9. evaluate
  10. help
  11. Prove by Induction that 4 + 8 + 12 + ... + 4n = 2n^2+2n
  12. Differential Equations and Rates
  13. I need help from the gurus
  14. differential equations
  15. Can someone assist me?
  16. Laplace Help
  17. Logistic Differantial Equation
  18. Please Help me solve this
  19. laplace's equation - disc
  20. Diff equation (xy' - 2y = x^3 e^x)
  21. help please (logistic equation)
  22. help again (temperature between two spheres)
  23. help with Laplace transform of tangent function
  24. Two Questions: Laplace transform, general sol'n
  25. Concentration of a solution over time
  26. "Abel's ODE of the 2nd Kind, Class C"
  27. homogenous second-order differential equations
  28. linear second order differential equation
  29. differential equations: bacteria growing in a lab culture
  30. Difficulty with an initial value problem.
  31. Dirichlet Boundary Value on Disk Problem
  32. gen. soln. to diff. eqn: dx/dy= (xy^3)/(2y^4 + x^4)
  33. find the general solution of y"-5y'+6y=0
  34. Vibrating Spring (Solving nonhomogeneous equations)
  35. help me solve this: (2 + y)(dy/dx) = (4 + y^2)
  36. first order systems of equations--- HELP!
  37. Please help me find the gen. sol'n V(P) for....
  38. Please help me find gen. sol'n for X(x) and T(t)
  39. homogeneous equation solution help
  40. [MOVED] gen. solution of diff eq. dr/dp = 2 sin p
  41. Nonlinear Diff Eqn: d^2y/dx^2 = V(X)y(x) - Ey(x)
  42. help: G ~ square (~ / $ / ?) H
  43. need help on Laplace Transform!
  44. Minimum volume word problem
  45. A cup of coffee anyone? (Newton's Law of Cooling)
  46. First order of equation: (dy/dx) + (cot x)y = csc x
  47. Find general solution of 2sqrt(x)(dy/dx) = sqrt(1 - y^2)
  48. Having trouble getting y by itself after integrating
  49. Find general solution for this separable equation.
  50. [SPLIT] general soln of [x csc(y/x) - y] dx + xdy = 0
  51. Differential Equations help: verify that...
  52. Euler Method
  53. [MOVED] partial integration: int ye^xy dx= e^xy
  54. Equation Nomenclature
  55. simple def eq problem, giving me lots of problems
  56. [MOVED] Differential Eqn- du/dt = e^(3u+3t)
  57. First order diff equation : x' lnx'=1/2 * c
  58. Find exact solution to dy/dt = (y - 1)(3 - y), y(0) = 5
  59. The cumulative human population of planet Earth.
  60. [MOVED] Given this Lotka-Volterra model system, show that
  61. Differential eq y'(t) + y(t) * x'(t) = -2x(1)
  62. Read Before Posting!
  63. Solving differential equation
  64. Solving DE eqn: x + 2ysqrt[x^2 + 1](dy/dx) = 0, y(0) = 1
  65. 2nd order linear w/ b^2-4ac<0: y''+4y'+8y=0, y(0)=1, y'(0
  66. Linear Algebra: solve system; show soln space as vector span
  67. First Order Homogenous Differential Equation
  68. Need Verification: [x(t)]^2 - 2[x'(t)]^2 = c where c is some
  69. 2nd Order differential eqn: x"(t) + 4x'(t) - 5x(t) = 9
  70. HELP!!: Laplace 2D equation on a square
  71. differential equation dy/dt = py^(1 + b), p > 0
  72. differential equation dy/dt = ky^(1 + c), k > 0
  73. Nonhomogeneous differential equation: y"+2y'+y=xe-x
  74. Implicit differentiation
  75. y'=(1-xy)^(1/2) -- what type of DE is this?
  76. modeling w/differential equations
  77. solve y' = (10yx - y) / (5x^2 - x) with y(1) = 8
  78. solving simultaneous equations
  79. find general soln for dP/dt = [bkPe^(-kt)] / [1 - be^(-kt)]
  80. Coordinate Transformation to solve Laplace Equation
  81. Differential Equation e^2x dy/dx = xcos^2y
  82. IVP using laplace transforms
  83. First order DE prob: find the family of curves that....
  84. Show that y = 4/(1 + Ce^(-4t)) solves y' = y(4 - y)
  85. problem with last step in differential equation and solution
  86. models of motion: A stone is released from rest and....
  87. freefall: A parachutist of mass 60 kg free-falls from an....
  88. Question About A Separable Equations Problem
  89. mixing problems: A tank initially conatins 100 gal of....
  90. IVP prob's: ydy/dx = x/sqrt1 + y2, y(0) = 1; etc.
  91. solving exact differential eqn: (1-ysinx)dx + cosx dy = 0
  92. x(t) = ae^(bt) + ct is soln to ODE d^2/dt^2 = 16e^(4t) / x
  93. which equilibria are attractors, repellors, or neither?
  94. describing asymptotic behaviour of soln of ODE
  95. solving a linear equation
  96. Solving a homogenous equation
  97. decay prob: find limiting amt of radium over time
  98. Help me with this...
  99. Euler Equation
  100. Compartmental Analysis