Who's up for some math problems?

[twesterm]

Lingyis said:

twesterm said:

Lingyis said:

twesterm said:

lestatdark said:

twesterm said:

lestatdark said:

Can you find me the first derivative of the Arctan(x² + x) equation?

 

f(x) = arctan(x²+x)

f'(x) = 1 / ((x²+x)² + 1) = 1 / (x²(x+1)²)

 

 

 

 Well done Twesterm, but the final result is 1/(x²(x+1)²+1), you forgot the 1 ;)

bah, forgot to copy it from paper to here :-p

 

 

do i even need to correct this?  it's clearly wrong.

My answers wrong?  >_>

-edit-

And to answer lestatdark, I should have a minor in math, I just didn't get around to declaring it.  >_<

 

yeah, it's wrong.  i hope you're not doing anything related to math these days... because if an engineer or scientist get this kind of derivative wrong there's no excuse.  but your profile says you're a designer so i guess it's okay (just that maybe there's a reason you weren't a math minor!).

 

 

It's good for not even thinking about Math for the last 3-4 years :-p

Now I gotta go look up and see what I did wrong...

Oh, lol, I did have the arctan derivative right, I just forgot to take the derivative x² + x

No need to be harsh, everyone makes mistakes and again, that was good enough for not thinking about arctan derivatives for 3 years and doing it from memory (though have to admit, didn't do the DiffEQ problem from memory) :-p