Friday, December 26, 2014

Determine the extreme value of the function x^2-2x+2.

To establish the extreme value of a function, we'll have
to calculate the first derivative of the function.


Let's
find the first derivative of the function
f(x):


f'(x)=( x^2-2x+2)'=(x^2)'-(2x)'+(2)'


f'(x)=2x-2


Now we
have to calculate the equation of the first
derivative:


2x-2=0


We'll
divide by 2:


x-1 =
0


x=1


That means that the
function has an extreme point, for the critical value
x=1.


f(1) = 1^2 - 2*1 + 2


f(1)
= 1-2+2


We'll eliminate like
terms:


f(1) =
1


The extreme point of the function is a
minimum point whose coordinates are: (1 ; 1).

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