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October 25th, 2016, 03:31 AM   #1
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Help with question



So I did method 2, but I have no idea what it means for method 1 and 3.

Any help would be greatly appreciated, thanks.

Last edited by skipjack; October 25th, 2016 at 04:33 AM.
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October 25th, 2016, 04:58 AM   #2
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I don't know how to edit, but I've done method 3; I just don't know what to do for method 1.

Last edited by skipjack; October 25th, 2016 at 05:31 AM.
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October 25th, 2016, 05:32 AM   #3
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For (3), x(5 - 2x) = 2(5/4)² - 2(5/4 - x)², so greatest area is 2(5/4)²m², etc.
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October 26th, 2016, 12:12 AM   #4
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I make it (5/3)^2
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October 26th, 2016, 06:42 AM   #5
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Quote:
Originally Posted by weirddave View Post
I make it (5/3)^2
Do you see that one dimension would be x, and the other dimension would be (5 - 2x)?

The area is x(5 - 2x).

After taking the derivative, setting it equal to 0 and solving for x, and substituting that back into
the area expression, please check the area again to see if you come up with skipjack's answer.
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