# Thread: Use the results of part c to show that B=1

1. ## Use the results of part c to show that B=1

Do not try to construct, and evaluate, Riemann sums involving ln. This would be far to dicult. Instead use the results you already found
in part (c), and have another look at the diagram.
I've already evaluated the limit in part b and found that A=(e-1).

Could someone please show me how to do part d?

2. If you were to "rotate" the graph around the line y= x, it would be come the graph of x= ln(y) or $y= e^x$. And the area under the curve, B, would become the area to the left of graph of $y= e^x$ between y= 0 and y= 1. Can you relate that area to the given limit?

3. ...confused

4. Originally Posted by HallsofIvy
If you were to "rotate" the graph around the line y= x, it would be come the graph of x= ln(y) or $y= e^x$. And the area under the curve, B, would become the area to the left of graph of $y= e^x$ between y= 0 and y= 1. Can you relate that area to the given limit?
What do you mean to the left of the graph? Do you mean the black area on the graph below?

Thanks a lot for the help.