Recent content by Ewan_C

Hi Tim, thanks for the response. So you mean that I should substitute y(x) = z(x)*e-2x into the original DE and solve it for z? Now I get it, that's what they meant from the start - I took "where y(x) is a solution of (1)" to mean a particular solution rather than the general solution. We...

Homework Statement (1): \frac{d^{2}y}{dx^{2}} + 4\frac{dy}{dx} + 20y = 10e^{-2x}\cos (rx), y(0) = 1, y'(0) = 0 Show that there is precisely one value for r for which e^{2x}y(x) can become arbitrarily large where y(x) is a solution of (1) The Attempt at a Solution I used Maple to...

Ah, thanks for that. That's what's causing the problem.

Hi guys For a science fair project, I am going to test the effects of X-radiation on flash memory. I'm intending to fill a number of 16MB (15,876,096 byte) Compactflash cards with data, hash check the data with hkSFV, expose them to the radiation and hash check again for any data corruption...

Okay, thanks for that

[SOLVED] Solving quadratic Homework Statement 1a) Solve f(x) = x^2- 4x+m in the form f(x) = (x-a)^2+ b 1b) What is the smallest value f(x) can have? The Attempt at a Solution 1a) Seems simple enough. I set f(x) to 0 and used the completing the square method to solve. Ended up with...

Thanks for the responses. I guess I'll stick with my method in the OP then.

[Solved] 3x4 system of equations Homework Statement Consider the following system of three equations in x, y and z. 2x + 4y + 5z = 17 4x + ay + 3z = b 8x + 7y + 13z = 40 Give values for a and b in the second equation that make this system consistent, but with an infinite set...