Need math help!

[HunterSeeker]

I am studing for a test I have in 2 days (major test). And considering none in my family has studied as much math as I am doing, so I wonder how do I derivate this formula?

y=0.5e^-x^2

y'=-0.5e^-x^2 is the only thing I can get it too and it is wrong

 

[Ikerous]

y = ae^(f(x))
y' = f'(x)ae^(f(x))

y' = -x e^(-x^2)

 

[evil^milk]

when i saw this thread i knew ikerous would be all over it instantly

 

[HunterSeeker]

Thanks a lot!

 

[Ikerous]

when i saw this thread i knew ikerous would be all over it instantly

Yea.. i was actually pretty excited when i saw the title

Thanks a lot!

Thank you <3

 

[staticprimer]

It's threads like these that remind me that I suck at math so very badly. :x

 

[baron insig]

when on this earth woudl you ever need to work out that??

please dear god explain to me why !!

 

[Dan]

it depends also on which exponent takes priority. I'd imagine there are brackets in the equation you're given, but e^(x^2) and (e^x)^2 are two different functions.

when on this earth woudl you ever need to work out that??

please dear god explain to me why !!

Calculus actually has a lot of real life application. Way more than some of the more out there theoretical maths. Mostly to do with physical systems. Take the vibrations of a damped spring system. You've got a force that depends on the stretch of the spring, you've got damping that depends on the speed of the spring, and your total force is equal to mass*acceleration. stretch (displacement), speed, and acceleration are all derivatives of each other. You've got a 2nd order differential equation that calculus will allow you to solve. This is what I get drilled into my head all day.

 

[DEATH eVADER]

Differentiation and Integration. Worst subject ever!!

 

[Shamrock]

Stop cheating!!

 

[JNightshade]

Those equations are genuinely terrifying.

 

[Shakermaker]

Oh man, math hurts my brain.

 

[SubKamran]

y = ae^(f(x))
y' = f'(x)ae^(f(x))

y' = -x e^(-x^2)

You beat me

That's easy stuff... :dork: It's not a lot of fun differentiating this *gets out math book*:

h^2 = (x^2 + d^2) + (x^2 + (h+d)^2) - 2(sqr(x^2 + d^2)(sqr(x^2 + (h + d)^2)(cos(theta)))

Nevermind how to GET that in the first place from a triangle. "What value of x maximizes theta so the viewer can see the painting properly?"

By the way, h and d are constants. So really, it isn't too hard, it just gives a huge derivative until I simplify it... *cough*implicit differentiation*

God I hate Optimization Problems. :angry: JUST STAND WHERE YOU CAN SEE THE ****ING PAINTING, OK?!

 

[Sui]

hahah! I left all of that behind in high school!

 

[Muffin Man]

Stop cheating!!

He's studying -_-, and even if u weren't kidding, cheating is fun and easy

 

[SubKamran]

hahah! I left all of that behind in high school!

I'm doing AP so I can skip it in college. :rolling: Most of my colleges that I'm applying to accept it.