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# Forum: Differential Equations

Advanced calculus topics from Diff EQ go here.

1. ### Sticky: Read Before Posting!

• Replies: 0
• Views: 15,099
Ted
10-04-2006, 10:13 PM
1. ### Partial anti-deriv's: I get to -x^3 - x^2 y^2 - x^2 y^2 = c, but then I can't get ans

• Replies: 2
• Views: 675
12-12-2017, 03:38 PM
2. ### Mixtures for brewing coffee (basic mixture model is da/dt= (rate in) - (rate out) )

• Replies: 2
• Views: 799
12-03-2017, 08:05 PM
3. ### exact diffrential equation: solve p(x,y) dx +(4y^3 - 6x^3 y) dy=0

• Replies: 1
• Views: 684
12-03-2017, 06:43 PM
4. ### Runge-Kutta 2nd order (Midpoint method) confusion (for y=vtsin(θ) -0.5gt^2 )

• Replies: 1
• Views: 2,089
11-30-2017, 11:46 AM
5. ### 3 species Predator Prey Model: dP1/dt = P1( a - bP1) - cP1P2, dP2/dt = dP1P2 - ...

• Replies: 1
• Views: 676
11-27-2017, 10:44 PM
6. ### Growth and Decay: population growth is proportional to current population

• Replies: 1
• Views: 800
11-17-2017, 07:04 AM
7. ### Getting 0 for a particular solution: r^2*dy/dr = K, r>0, K constant

• Replies: 5
• Views: 833
11-16-2017, 01:07 PM
8. ### System O.D.E: d(Ca)/d(t)=-k*Ca*Cb-Q*Ca/V, d(Cb)/d(t)=-k*Ca*Cb+Q*(Cbo-Cb)/V

• Replies: 0
• Views: 741
11-11-2017, 09:05 AM
9. ### Calculating Speed

• Replies: 1
• Views: 531
11-10-2017, 07:59 AM
10. ### Solving Exact Diff. Eqns w/ Coefficients >1 in Soln: dr/dΘ=(r^2 sin Θ)/(2r cos Θ -1)

• Replies: 5
• Views: 1,658
11-06-2017, 09:03 AM
11. ### Help with using integrating factor to solve dy/dt = 2x + 4t (ans: -2t -1 + ce^(2t))

• Replies: 3
• Views: 975
10-30-2017, 08:36 AM
12. ### Higher Order Differential Equation: (D^3 + 1) y = cos^2(x/2) + e^{-x}

• Replies: 1
• Views: 1,348
10-07-2017, 10:14 AM
13. ### Linear systems in matrix notation

• Replies: 1
• Views: 890
10-03-2017, 04:27 PM
14. ### Mixture problem

• Replies: 2
• Views: 881
09-24-2017, 06:58 PM
15. ### stationary solution for u(x,t)=v(x,t)+h(x) for heat PDE with BC of U1

• Replies: 5
• Views: 1,539
09-18-2017, 02:07 AM
16. ### [Z transform] problem with MATLAB

• Replies: 0
• Views: 898
09-09-2017, 01:45 AM
17. ### Fundamental set of solutions for a DE: functions cos(ln x) and sin(ln x)

• Replies: 2
• Views: 1,175
08-27-2017, 08:48 PM

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