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Applied Optimization
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Applied Optimization
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5. Graphical Applications of Derivatives / Applied Optimization / Problem 3
Problem 3
Determine the minimum sum
x
+
4
y
x + 4y
for positive numbers
x
x
and
y
y
satisfying the equation
x
y
=
18
xy = 18
.
A
2
2
2\sqrt2
B
4
2
4\sqrt2
C
6
2
6\sqrt2
D
12
2
12\sqrt2
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