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Maths Puzzle
Numerical Ability
(-4)(7)+(-4)(-9)
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book Other Question
Find two positive real numbers whose sum is 40 and whose product is a maxium.
Construct the function f(x) = x(40 - x).
How is this found?
Furst of all, thank you for all the recent help-I think I may be getting this, but, of course, something else has come up and has stopped me. May I ask for help with this?:
in sol