Determine the intervals in which the function `f(x)=x^4-8x^3+22 x^2-24 x+21` is decreasing or increasing.

Determine the intervals in which the function f(x)=x^(4)-8x^(3)+22x^(2)-24x+21 is decreasing or increasing.

Determine the intervals in which the function f(x)=x^(4)-8x^(3)+22x^(2)-24x+21 is decreasing or increasing.

Determine the intervals in which the function f(x) = x^3 + 5x^2 -1 is increasing or decreasing.

Find the interval in which the function f(X) = 3x^4 - 4x^3 - 12 x^2 + 5 is increasing or decreasing.

Find the interval in which the function f(x)=2x^(3)-21x^(2)+36x-40 is increasing or decreasing.

Find the intervals in which the function f(x)=x^4-(x^3)/3 is increasing or decreasing.

Find the intervals in which the function f(x)=x^4-(x^3)/3 is increasing or decreasing.

Find the intervals in which the function f(x)=x^4-(x^3)/3 is increasing or decreasing.

Find the intervals in which the function f(x)=2x^3-24x+25 is increasing or decreasing.

Find the intervals in which the function f(x)=x^(4)-(x^(3))/(3) is increasing or decreasing.