# Thread: Help with logarithmic function question? (Graphing)?

1. ## Help with logarithmic function question? (Graphing)?

So the question goes like this:

The curve crosses the x-axis at x=2. Find the value of k.
Hence, using the graphical method, find the value of x for which ln(3x-k)=e^x-10

I've already solved the first part of the question. My answer is k=5.
Can anyone help me with the 2nd part of the question? Im not sure how to approach it.
Is e^x-10 another graph? Do i have to find the intercepts?

Thank you so much!

2. ## Re: Help with logarithmic function question? (Graphing)?

Hey pumbaa213.

e^x - 10 is another function of x and the intersection occurs when the two expressions are equal.

Basically you need to solve for x by getting x on one side of the equation (if possible but for this particular example probably not).

So with the graphical method, you need to plot both curves and see where they cross each other (i.e. intersect).

4. ## Re: Help with logarithmic function question? (Graphing)?

Thanks guys!!!