Raymond B. answered 10/09/21
Math, microeconomics or criminal justice
for a function f(x)
find the relative minimum or maximum by taking the derivative and setting it equal to zero
f'(x) = 0
then solve for x. then plug that x value back into f(x) to get the maximum or minimum y value.
for example f(x) =x^2
f'(x) = 2x = 0, x= 0
the minimum point is f(0) = (0)^2 = 0
or for example f(x) = x^3 + (3/2)x^2 - 90x + 5
f'(x) = 3x^2 + 3x - 90 = 0
x^2 + x -30 = 0
(x-5)(x+6) = 0
x=-6 or 5 = the x coordinate of the relative maximum or minimum point
to find the y value, plug that x coordinate into f(x), the cubic polynomial.