Given f(x)=x3−3x2−x+3f(x) = x^3 - 3x^2 - x + 3f(x)=x3−3x2−x+3. For what range of xxx is f(x)<0f(x) < 0f(x)<0?
x<−1x < -1x<−1 or 1<x<31 < x < 31<x<3
−1<x<1-1 < x < 1−1<x<1 or x>3x > 3x>3
x<1x < 1x<1 or x>3x > 3x>3
1<x<31 < x < 31<x<3