- Finding speed
- damped spring problem using mathematica
- Solving Universal law of Gravitation as 2nd order DE
- Differential equation Family of curves orthogonal
- Newton's Law of Cooling: A corpse was discovered at 2pm....
- Find gen. soln to system of ODEs where x' = Ax and....
- 2nd order diff. eqn: y''+ 12y'+ 36y=0, y(0)=1, y'(0)=-1
- dy/dx = (y- y^2)/ x for all x not zero; verify that y = ....
- particular solutin, variation of constants
- finding a solution to a second order dif eq
- calculating r(t) and theta(t)
- find the general soln of dy/dx = (2x^3 + 6)/y
- [MOVED] Find gen. soln to dy/dx = (2x^3 + 6)/y
- population and rate of growth (logistic function)
- inverse Laplace transform of 1/s^5 - (5 - 9s) / (s^2 + 100)
- inverse Laplace Transform: (7s^2+20s+53)/[(s-1)(s^2+2s+5)]
- Linear independant or dependant?
- Help solving 2nd order diff eq.
- Differential equation problem
- inverse Laplace transform: y''-y = 2t, y(0) = 0, y'(0) = -1
- inverse Laplace: y''-y'-2y = e^(2t), y(0) = -1, y'(0) = 0
- Eigenvalues
- Undetermined Coeff's & solve eqn: y"-3y'-4y = -8e^t
- Please Check my Work: y'' + y = 0, y(0) = 0, y(n/2) = 2
- General Solution for y"-y'=e^x - sinx
- Finding Time of Death
- general solution using laplace, convolution
- differential equation 42= 3(dT/dt) + 0.03T models temp T of
- Springs: spring stretches 0.5 ft when a 2-lb wt is attached
- real/complex solutions of planar systems
- Spring/Mass systems, did all the work, just need a check.
- PLEASE HELP: define a, in terms of B and T
- PDE Problem for Exam Tomorrow
- finding a solution/ characteristic equation
- first order differential equation: x dy + y d = y dy
- Two eqns: 3y' + 3xy = e^-3(x^2)/6; x^2 y'' - 3xy' + 3y = 0
- help with dy/dx + 4xy - (cos x / e^2x^2) =0
- x^2 y'' + 4xy' - 10y = 3/x^5 , x > 0
- [SPLIT] y'' - 3y' + 2y = - 6e^{4x}, y(0) = y'(0) = 1, x = 1
- differetiation equation dy/dx = e^y*square root (x+1)
- 2y'(x) + y''(x) = x : How do I find particular solution?
- Differential Equation: dy/dx = x/y^2 with y = 3 for x = 2
- [SPLIT] 4y(x) + y''(x) = x has complex characteristic
- a little different tank emptying problem
- I got stuck: What is t if t + 40 = 10e^(t/60)?
- Use seperation variables for 'dy/dx = x/y + y/x + 1'?
- A question about LRC Series Circuits
- Power series DE
- Laplace Transform
- Solution for (x^n)(x+k)y'' + Qy=0
- Verifying solutions of ODEs
- Separable Eqn: y' = (xy + 3x -y -3)/(xy -2x + 4y -8)
- 2nd order non-hom. eqn: y'' - 2y' - 3y = x^2 - 1
- Solve (x^n)(x + k)y" + Qy = 0 for n, k, Q real values
- Solve Cauchey-Euler Eqn x^2 * y" - 2xy' + 2y = 2 * ln(x
- Laplace Transform Prob: y"-2y'-3y=1 if y(0)=0, y'(0)=1
- System of Differential Eqns: (D-1)x-y=0, (D-4)x+Dy=0
- Spring Problem: Without Damping
- Find the Recursion Formula (Ck+1) Assoc. w/ power series
- Determine Laplace Transform for piecewise function
- Inverse Laplace Transform: L-1[(se^-pi*s)/(s^2+4)], etc
- Laplace Transforms: transform f(t) = 2t + 6
- Distance, Velocity, and Acceleration of a vehicle
- Initial Value Prob: y' = (3x^2)/[(3y^2)-4] where y(0)=1
- Diff. Equation Help: (1+y^3)y' = x^2
- Initial value PDE: the Black-Scholes model (part a)
- Initial value PDE: the Black-Scholes model (part b)
- Initial value PDE: the Black-Scholes model (part c)
- Solve the initial-value problem
- Method of undetermined coefficients
- Find y(x) for y''(x)-g'(x)y'(x)/g(x)+g(x)^2*y(x)=0
- diff eqn word prob: A 95*C cup of coffee is in a 20*C room.
- Find Laplace Transform of f(t); solve IVP x'(t)-2x(t)=4f(t)
- The derivative of y = e^x is y' = e^x. Why?
- Linear Differentiation: 1 = xy = xy', y' - y = 1/x
- what is this course about?
- pde involving airy function
- Undetermined Coefficients/Var. of Parameters: y'' - y' = e^x
- Laplace Transforms: ( 100(s+10) ) / ( s(s+5)(s+20) ) and....
- Radioactive Decay: Find amount present at any time after....
- can't solve y'*(x - ln(y'))=1: tried parameters, but....
- Convolution & Laplace Transforms: e^t (u(t))*cost(t)u(t)
- initial-value prob: 2y" + 5y' +3y =0, y(0) =3, y'(0)= -
- particular solutions, boundary conditions, falling object
- implicit differentiation to find y' for 4x^2 + 9y^2 = 4
- Annihilarator technique for y'' + 4y' + 4y = 5xy^(-2x)
- simple ODE: particular soln of 2ydx = 3xdy, x = 2, y = -1
- PDE Separation of Variables: dT/dz+(1/x)*dT/dy+d^2T/dx^2=0
- linear equation (general sol'n): (y+1)dx + (4x-y)dy = 0
- linear differential eqn: (1+t^2)ds+2t(st^2-3(1+t^2)^2)dt=...
- Spectral solving PDE: d^2u/dx^2 + d^2u/dy^2
- Differential Equations: why given after calculus 3?
- College Math 105 issues...tutor center closed!
- Finding homogeneous soln to y'' + 3y' + 2y = sin(2x)
- need help w/ 5x2 + 14x - 3 = 0 the 2 means squared
- parachute problem
- a falling model
- verify by differentiation: y' +3y =e^(-t) y(0)=-1/2 for...
- Envelope of the family of curves
- A differential equation: dy/dx = e^ysinx^x / ysecx