Mathematics - Functions Question with Solution | TestHub

If $\mathrm{f}(\mathrm{x})$ is twice differentiable function such that $\mathrm{f}(1)=0,\mathrm{f}(3)=2$, $\mathrm{f}(4)=-5,\mathrm{f}(6)=2,\mathrm{f}(9)=0$ then the minimum number of zero's of $g^{\prime }(x)=x^2{f}^{\prime \prime }(x)+2x{f}^{\prime }(x)+f^{\prime \prime }(x)$ in the interval $(1,9)$ is