Derivative help

G

Guest

Guest
Does anyone know where I can get help on derivates. My teacher did not really give good in class notes so I was wondering if there are any online resources.
 
I looked there before I posted. That doesn't really help me with problems like this:

y = 3(6(6x - 8)) - 8

and

y = 14^(x-1)
 
The first is mostly an algebra problem. Eliminate the ()s and you end up with
y=ax+b, a polynomial which is covered in that site.
The second is d(a^u) = a^u*ln(a)du
 
i couldnt find it on there, maybe I am blind. But I tried what you wrote Gene.

1. I got 18 In 6 ( 6 ^(6x-8))

2. 14 ^ x-1 In 14

Did I do these right?
 
Ya got a lot more ()s and no ln nor ^.
y = 3(6(6x - 8)) - 8 =
3(36x - 48) - 8 =
216x - 288 - 8 =
216x - 296
That's the polynomial I wanted you to differentiate. Re-read the polynomial section of the help to get
dy/dx = 216

Right. Just one comment. Take some of the ()s you got rid of in the first and use them here.
14 ^ x-1 ln 14 is better as
14 ^ (x-1) ln (14) to make it clear where things end. 14^x-1 really says -1+14^x. The (14) doesn't really need them, but it is good practice. If it were ln x+2 you would NEED ln(x+2) for it to be typed correctly.
 
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