Methods - Help

[nbalakers24]

Hi

I need help on this question:




Help appreciated ! Thanks!

 

[/0]

a) Split the figure up into 2 squares:

The perimeter is , giving us . Solving for y we can sub 'y' out of the Area equation so we are left with x.

b) For a start, we require and , as lengths must be positive. Secondly we require that and for the diagram to make sense. (Since these second restrictions are tighter than the first, we can ignore the first restrictions). These establish our lower bounds.

We can establish upper bounds from the perimeter equation .
Since , we have , so .
Since , we have , so .

Thus, , .

c) It's a quadratic in the interval (12,60). Remember to leave open endpoints.

d) Find the turning point by completing the square or calculus.

[nbalakers24]

thank-you!

[Aqualim]

a) Split the figure up into 2 squares:

shouldn't it equal ?

[/0]

a) Split the figure up into 2 squares:

shouldn't it equal ?

indeed

[samiira]

hey.. how did u paste the picture there..??

[GerrySly]

hey.. how did u paste the picture there..??

Use the img tags

Code: [Select]

[img]http://url.to/image/here[/img]
Then just upload it to some photo hosting site like Photobucket or Imageshack

[samiira]

ok.. kool.. thanks