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# C3 Product rule question watch

1. You should use the product rule to diffreniate functions that are multiplied together.

Let the first function = u (in terms of x)
and the second = v (in terms of x as well)
then use the rule dy/dx= u(dv/dx)+ v(du/dx)
2. (Original post by FZka)
You should use the product rule to diffreniate functions that are multiplied together.

Let the first function = u (in terms of x)
and the second = v (in terms of x as well)
then use the rule dy/dx= u(dv/dx)+ v(du/dx)
I have seen the applications of the product rule before...
3. (Original post by THRASHx)
I have seen the applications of the product rule before...
Well, I can't penetrate your brain and know this.
I cannot explain anything unless I make sure you get the basics.
4. some plebian gave me a neg rep for putting down the wrong answer - what is the right answer? and to that mug: not gettin none of ya CDs baaaaaaaaaaaaaaaaaaaaaaaaaaack
5. just realised i got the right answer - that mentalist ought to get completely raped of his dignity

a train on a circular track aint the only thing that travels in circles - im referring to karma if u didnt realise, pleb

PS i dont mind neg rep but the vicious side comment has enraged me, to a point where i used my formula sheet to dry my tears. im not the kinda guy who ordinarily looks for beef but when i get pboyed off u can call me a butcher
6. OK enough rubbish.

7. If you can't do these simple differentiation questions. Then you won't know how to combine chain rule with the product & quotient rule, Hey Good luck with the exam on Wednesday.
8. (Original post by Casshern1456)
If you can't do these simple differentiation questions. Then you won't know how to combine chain rule with the product & quotient rule, Hey Good luck with the exam on Wednesday.
Hey, this is combining the chain rule with the product rule
And I made a stupid mistake of multiplying the wrong thing, thats why I was so annoyed cus ive done it for much more difficult equations.

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