seb--morin
Im high
+152|6610|Montréal, Québec
I dont have school all week long but i got tons of homework.... Okay so i started to do some derivative in my maths class and i have a couple of them to resolve.

Here is the one that i can't go pass step 2...

d/dx (3x^2-4) * d/dx (x^2-1)

okay so then i figured this out with the rules that he gave me..


   d/dx (3x^2-4) * d/dx (x^2-1)

= d/dx (3x^2-4) * (x^2-1)   +  (3x^2-4) * d/dx (x^2-1)      ---> where i got a derivate on both side that multiply a function, is it okay?

then i don't know if i can just multiply both polynom on each side and then add them together... But that you give me the same on both side?!




Also this one that i dont even know what to do !

d/dx ((x^2-4x) e^x)    ???
VicktorVauhn
Member
+319|6362|Southern California
go read the chain rule, derivatives are fucking easy.

"then i don't know if i can just multiply both polynom on each side and then add them together... But that you give me the same on both side?!"
you get the derivative of function A times function B plus the derivative of function B times function A, then its just algebra. Yes you just multiply and add.

I forget how to do something to the x power... that might be chain rule again, go dig through examples I promise your book has an example of e^x

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