Given the function( ) ( 3)( 2)y x x x= + − , for4 4x− . What is the value of x atwhich the function has a minimum?(A)32−(B)12−(C)12(D)32
Question
Given the function( ) ( 3)( 2)y x x x= + − , for4 4x− . What is the value of x atwhich the function has a minimum?(A)32−(B)12−(C)12(D)32
Solution
To find the value of x at which the function has a minimum, we need to find the critical points of the function.
Step 1: Take the derivative of the function with respect to x.
The derivative of (3x^2 - 2x + 4) is 6x - 2.
Step 2: Set the derivative equal to zero and solve for x.
6x - 2 = 0 6x = 2 x = 2/6 x = 1/3
Step 3: Check the second derivative to determine if the critical point is a minimum or maximum.
The second derivative of (3x^2 - 2x + 4) is 6.
Since the second derivative is positive, the critical point x = 1/3 corresponds to a minimum.
Therefore, the value of x at which the function has a minimum is 1/3.
So, the correct answer is (B) 1/3.
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