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Asked by
rolan
Draw a kite that has a triangle with sides 1, 1, 2x next to a triangle with sides 2x, 2, 2. Find the area A and the x that maximizes it.
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Answered by
Steve
The area of the kite is
a = x(√(1-x^2) + √(4-x^2))
da/dx =
[√(1-x^2) + √(4-x^2)][√(1-x^2)√(4-x^2)-x^2]
----------------------------------
√(1-x^2)√(4-x^2
da/dx = 0 when x = 2/√5
Answered by
deel
thanks for your help
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