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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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Topic review (newest first)

Roraborealis
2005-03-20 06:35:19

You're such a nice person!

MathsIsFun
2005-03-19 07:52:27

You noticed, and were curious about, the algebra. You write well, too.

Roraborealis
2005-03-19 04:30:54

Thank you.....but how do you know....?

MathsIsFun
2005-03-18 08:47:45

You're doing well!

Roraborealis
2005-03-18 08:24:07

I'm only thirteen!

MathsIsFun
2005-03-18 08:19:23

Depends on where you live. Some countries start Calculus in the final year of high school.

But usually Universities teach it in the first year.

I was thinking of putting a small introduction to it on this website.

Roraborealis
2005-03-18 07:51:11

How old are you expected to be to be at that standard?

MathsIsFun
2005-03-18 07:17:36

The difficult kind ! It has calculus in it.

Roraborealis
2005-03-18 07:04:56

Um...what kind of algebra is that?

MathsIsFun
2005-03-08 20:35:36

A bit outside my area, but I found a website that has ALL sorts of stuff about harmonic motion which could help here

Su165
2005-03-08 19:55:12

Can anyone give me a hand with this, cause I'm stumped and can't remember exactly how to go about solving this.

here's the eqn

m[d^2x/dt^2 + wsubo^2 x] = F cos wt

I'm supposed to show that x(t) = xsubo cos wt

w is the incident freq
wsubo is the resonant freq
m is mass

I'm guessing it has to be shown by undetermined coefficients but I can't find the right path exactly.

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