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margejean
Group Title
What is the minimum value of the function: f(x)=2x^210x+5?
 2 years ago
 2 years ago
margejean Group Title
What is the minimum value of the function: f(x)=2x^210x+5?
 2 years ago
 2 years ago

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Mimi_x3 Group TitleBest ResponseYou've already chosen the best response.2
Have you differentiated it?
 2 years ago

margejean Group TitleBest ResponseYou've already chosen the best response.0
No I have not. How do you do that?
 2 years ago

Mimi_x3 Group TitleBest ResponseYou've already chosen the best response.2
do you know calculus?
 2 years ago

margejean Group TitleBest ResponseYou've already chosen the best response.0
No I havent taken that class yet. This is AP Stats.
 2 years ago

Mimi_x3 Group TitleBest ResponseYou've already chosen the best response.2
Statistics..? This is Calculus. Or is there an algebra method to solve this?
 2 years ago

margejean Group TitleBest ResponseYou've already chosen the best response.0
This class is AP Stats but U guess it is just basic math review. (Algebra)
 2 years ago

Mimi_x3 Group TitleBest ResponseYou've already chosen the best response.2
Hm, I don't know the algebra method.. maybe @lgbasallote might know
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.0
i dont know algebra sorry
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.1
when the first derivative is zero, there will be a minimum or maximum
 2 years ago

Mimi_x3 Group TitleBest ResponseYou've already chosen the best response.2
is the algebra method got to do something with the vertex (b)/2a?
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.1
yes Mimi_x3, that formula will give us the xcoordinate of the vertex,
 2 years ago

margejean Group TitleBest ResponseYou've already chosen the best response.0
um i am not sure, but i think if I use (b)/2a the answer would be 5 or 2.5?
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.1
the value is the f(x), so sub x=b/2a into f f(b/2a)= to get the value of f(x) that the minimum
 2 years ago

Mimi_x3 Group TitleBest ResponseYou've already chosen the best response.2
Vertex: \[\large \left(\frac{b}{2a},a\left(\frac{b}{2a}\right)^{2}+b\left(\frac{b}{2a}\right)+C\right) \] a> 0 => its a min a<0 => its a max. however, the calculus method is more nicer :)
 2 years ago

margejean Group TitleBest ResponseYou've already chosen the best response.0
I got 2.5.i hope its right. thank you for helping.
 2 years ago
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