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moneybird
Group Title
If a and b are positive numbers, find the maximum value of f(x)=x^a*(1x)^b, 0 less than or equal to x less than or equal to 1.
Your answer may depend on a and b. What is the maximum value?
 3 years ago
 3 years ago
moneybird Group Title
If a and b are positive numbers, find the maximum value of f(x)=x^a*(1x)^b, 0 less than or equal to x less than or equal to 1. Your answer may depend on a and b. What is the maximum value?
 3 years ago
 3 years ago

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amistre64 Group TitleBest ResponseYou've already chosen the best response.1
maximum value of: \[f(x)=x^a*(1x)^b;\ 0\le x \le 1\]
 3 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
\[f'(x)=ax^{(a1)}(1x)^bx^ab(1x)^{(b1)}\] \[ax^{(a1)}(1x)^bx^ab(1x)^{(b1)}=0\] solving this might get us some critical points
 3 years ago

moneybird Group TitleBest ResponseYou've already chosen the best response.3
Critical point = a/(a+b)?
 3 years ago

moneybird Group TitleBest ResponseYou've already chosen the best response.3
Got the answer. It is (a/(a+b))^a(b/(a+b))^b
 3 years ago

moneybird Group TitleBest ResponseYou've already chosen the best response.3
Thanks for helping
 3 years ago

amistre64 Group TitleBest ResponseYou've already chosen the best response.1
\[ax^{(a1)}(1x)^b=x^ab(1x)^{(b1)}\] \[ax^{(a1)}x^{a}(1x)^b=b(1x)^{(b1)}\] \[ax^{1}(1x)^b=b(1x)^{(b1)}\] \[a=xb(1x)^{(b1)}(1x)^{b}\] \[a=xb(1x)^{1}\] \[\frac{a}{b}=\frac{x}{1x}\] \[aax=bx\] \[a=bx+ax\] \[\frac{a}{b+a}=x\] looks to be that way if i did it right
 3 years ago
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