Differentiation of an exponential function

[pavadrin]

Hey,
I have a problem involving natural logs which has got me confused, even though it appears simple.
The problem: Find the exact coordinates of the point on y = e^x where the gradient is 2.
From previous experience, I know that differentiation is required, but because of the e I am not sure on how to go about this. After the differentiation I think I can manage to complete it.
Thanks,
Pavdarin

 

[d_leet]

Hey,
I have a problem involving natural logs which has got me confused, even though it appears simple.
The problem: Find the exact coordinates of the point on y = e^x where the gradient is 2.
From previous experience, I know that differentiation is required, but because of the e I am not sure on how to go about this. After the differentiation I think I can manage to complete it.
Thanks,
Pavdarin

Well what is the derivative of y = e^x?

 

[sdekivit]

if you don't know it you can find out using the given that d/dx ln x = 1/x and then calculate d/dx ln e^x using the chain rule

 

[Benny]

If you know how to do this kind of problem then all you need is the derivative of e^x which is just e^x. Just do this problem as you would do if "y" was any other function, for example a polynomial.

 

[pavadrin]

thanks for the help, however i am still unsure on how to approach this problem

 

[sdekivit]

thanks for the help, however i am still unsure on how to approach this problem

the derivative is the gradient, so the following must be solved:

\frac {dy} {dx}\ = 2

This will give you the x-coordinate.

 

[HallsofIvy]

thanks for the help, however i am still unsure on how to approach this problem

You "approach" this problem by differentiating e^x! What is the derivative of e^x? (It's the world's easiest derivative!)