I'm supposed to find the dimensions of a rectangular region with a maximum area that can be enclosed by 80 feet of fencing. this is what I have so far...
2x+ 2y=80
-2x -2x
2y=80-2x
y= 80-2x
------ --------> y= 40- (-1x)
2
Can somebody telling me if this is right so far?I got the -1x from the -2x
---
2
Is that correct so far? If not, could you please set me on the right track?
You have the right idea, but took your derivative wrong:
Now, what does the derivative of a function mean? It is the slope of the line tangent to the function at a given value of x. What happens to the derivative of a function when the function is at a relative maximum or minimum?
-Dan