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Cj He Knows his stuff

2 Answers · Entertainment & Music · 19/05/2009

2. ### Solve these 2 differential equations?

1.) y' + 4y = 2x*e^(-4x) Integrating factor = e^(∫4 dx) = e^(4x) Multiply both sides of the D.E by the integrating factor: y'*e^(4x) + 4*e^(4x)y = 2x d/dx[y*e^(4x)] = 2x y*e^(4x) = x² + C y = x²*e^(-4x) + C*e^(-4x) 2.) xy...

1 Answers · Science & Mathematics · 15/07/2010

3. ### D.E. solving via Substitution method?

xy y' = x² + y² y' = (x/y) + (y/x) let y = xv ; y' = xv' + v xv' = 1/v ∫ v dv = ∫ 1/x dx v² = 2 ln|x| + C₁ (y/x)² = 2 ln|x| + C₁ y = ± x √(2 ln|x| + C₁) Answer: y = ± x √(2 ln|x| + C₁)

1 Answers · Science & Mathematics · 17/07/2010

4. ### Trying to remember the title of a Ted Hughes poem...?

is it maybe "a woman unconscious"? if it isnt then here is a list of his poems if you want to look through them : http://www.poemhunter.com/ted-hughes/

2 Answers · Arts & Humanities · 08/07/2008

5. ### What is the value of a kramer aero star zx10? ?

...ownership (say a COA, photographs, letters from Mr Hughes confirming ownership,) maybe a \$700 (Sweet were a VERY...

5 Answers · Entertainment & Music · 04/09/2008

6. ### DE: Inductance/Capacitance problem, how to solve?

1 a. L(di/dt) + q/C = 0 i = dq/dt so di/dt = d^2 (q)/dt^2 L(d^2 (q)/dt^2 + q/C = 0 or q = - LC( d^2 q/dt^2)

1 Answers · Science & Mathematics · 17/03/2012

7. ### Name this Boston family?

... Family!! Laura Abigail Hughes married Scott Steven O...busy and now have 14 children named... Christopher Joseph O'Connor......

42 Answers · Pregnancy & Parenting · 12/01/2017

8. ### what is a good book for person that loves hockey other than the Matt Christopher books i need to know now?

...qid=1206139504&sr=1-3 "Open Ice" by Pat Hughes http://www.amazon.com/Open-Ice-Pat-Hughes/dp/...

2 Answers · Arts & Humanities · 21/03/2008

9. ### How to solve this Differential Equation?

x y'' + 2y' = 1/x let v = y' v' + 2/x v = 1/x² d/dx [ x² v ] = 1 x² v = ∫ dx x² v = x + C₁ v = 1/x + C₁/x² y = ∫ v dx = ∫ 1/x + C₁/x² dx y = ln|x| - C₁/x + C₂ Answer: y = ln|x| - C₁...

2 Answers · Science & Mathematics · 15/07/2010

10. ### Given an Acceleration function, give the velocity and position function with initial conditions?

Because the value of the function varies continuously with time, you cannot get an answer for this question from only "algebraic steps." This is why Newton invented Calculus. Just take the integral of the acceleration function to...

1 Answers · Science & Mathematics · 15/07/2010