On which set is $r(x)=2x^3-54x$ INCREASING?

The graph shows $y=u^{\prime }(x)$ for a differentiable function $u$. On which set is $u$ INCREASING?

On which set is $r(x)=2x^3+15x^2+24x$ DECREASING?

On which set is $f(x)=\cos x$ decreasing on $\left[0,2\pi \right]$, with $x$ in radians?

On which set is $q(x)=\frac{x}{x+2}$ INCREASING?

On which set is $g(x)=2x^3+12x^2$ INCREASING?

On which set is $f(x)=\frac{x}{x-4}$ DECREASING?

On which set is $f(x)=e^x-x$ decreasing?

On which set is $f(x)=\sin x$ increasing on $\left[0,2\pi \right]$, with $x$ in radians?

The graph shows $y=g^{\prime }(x)$ for a differentiable function $g$. On which set is $g$ INCREASING?

On which set is $f(x)=\cos x$ increasing on $\left[0,2\pi \right]$, with $x$ in radians?

The graph shows $y=f^{\prime }(x)$ for a differentiable function $f$. On which set is $f$ INCREASING?

On which set is $q(x)=\frac{x}{x+8}$ INCREASING?

On which set is $f(x)=2x^3+18x^2+48x$ DECREASING?

On which set is $g(x)=2x^3+12x^2+18x$ DECREASING?

On which set is $u(x)=\frac{x}{x+6}$ INCREASING?

On which set is $f(x)=\sin x$ decreasing on $\left[0,2\pi \right]$, with $x$ in radians?

On which set is $u(x)=\frac{x}{x-9}$ DECREASING?

On which set is $u(x)=2x^3+3x^2-36x$ DECREASING?

On which set is $f(x)=\frac{x}{x-7}$ DECREASING?

On which set is $f(x)=2x^3+6x^2-48x$ DECREASING?

On which interval is $f(x)=\tan x$ increasing, with $x$ in radians?

On which set is $w(x)=2x^3-15x^2+36x$ DECREASING?

On which set is $g(x)=2x^3-3x^2-36x$ INCREASING?

On which set is $r(x)=2x^3-9x^2$ INCREASING?

On which set is $f(x)=x\ln x$ increasing, for $x>0$?

On which set is $f(x)=\sqrt{x}$ increasing?

On which set is $f(x)=\ln \left(x^2+1\right)$ increasing?

The graph shows $y=v^{\prime }(x)$ for a differentiable function $v$. On which set is $v$ INCREASING?

The graph shows $y=v^{\prime }(x)$ for a differentiable function $v$. On which set is $v$ INCREASING?