Find the intervals in which `f(x)=3/(10)x^4-4/5x^3-3x^2+(36)/5x+11` is increasing or decreasing.

Find the intervals in which f(x)=(3)/(10)x^(4)-(4)/(5)x^(3)-3x^(2)+(36)/(5)x+11 is increasing or decreasing.

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

Find the intervals in which f(x)=(x^4)/4+2/3x^3-5/2x^2-6x+7 is increasing or decreasing.

Find the intervals in which f(x)=3/2x^4-4x^3-45 x^2+51 is increasing or decreasing.

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

Find the intervals in which f(x)=x^(4)-4x^(3)+4x^(2)+15 is increasing or decreasing.

Find the intervals in which f(x)= 3/(10)x^(4)-4/(5)x^(3)-3x^(2)+36/(5)x+11 is (a) strictly increasing (b) strictly decreasing.

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

Find the intervals in which f(x)=5x^(3//2)-3x^(5//2),\ \ x >0 is increasing or decreasing.

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