100k views
1 vote
Unction f(x)=-3x^(2)+6x-5, address the follo have a maximum or minimum value? num or minimum value?

User Rasean
by
9.1k points

1 Answer

3 votes

Given the equation of the quadratic function: f(x) = -3x^2 + 6x - 5, we see that it is in the general form of a quadratic function, f(x) = ax^2 + bx + c, where a, b, and c are coefficients, and x is the variable.

The coefficient of x^2 is -3. When the coefficient a in the quadratic expression ax² + bx + c is negative, the parabola opens downward. This tells us that the function has a maximum point since an upside-down U-shaped parabola's peak provides us the maximum.

To find the x-coordinate (h) of the vertex, we need to use the formula -b/2a. In this case, a is -3 and b is 6. When substituting these values into the formula, we get:

h = -b/(2a) = -6/(2*(-3)) = 1.0

So, the x-coordinate of the vertex is 1.0.

Now we know that the x-coordinate h of the maximum point is 1.0, we substitute this back into the function to get the maximum value (k), which would be the y-coordinate of the vertex.

f(h) = -3*h^2 + 6*h - 5 = -3*(1)^2 + 6*1 - 5 = -3 + 6 - 5 = -2.

So, the function has a maximum value of -2 at x = 1.0.

User Hari Narayanan
by
8.0k points