Find three positive numbers whose sum is 310 and whose product is a maximum.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Find three positive numbers whose sum is 310 and whose product is a maximum.
Step 1
Let the three numbers be x, y, and z. Then x + y + z = 310
310 .
This can be rewritten as z = 310
310 - х — у.
Step 2
We wish to maximize the product xyz. Substituting z = 310 – x - y gives us
(x+y+z)
f(x, у) %3
Transcribed Image Text:Find three positive numbers whose sum is 310 and whose product is a maximum. Step 1 Let the three numbers be x, y, and z. Then x + y + z = 310 310 . This can be rewritten as z = 310 310 - х — у. Step 2 We wish to maximize the product xyz. Substituting z = 310 – x - y gives us (x+y+z) f(x, у) %3
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