question_answer

Let\[f\left( x \right)={{\left( {{x}^{12}}-\text{ }{{x}^{9}}+{{x}^{4}}-x+1 \right)}^{-1/2}}\]. The domain of the function is:

A)  \[(1,\,\,\infty )\]             

B)  \[(-\infty ,\,\,-1)\]

C)  \[(-1,\,\,1)\]                   

D)  \[(-\infty ,\,\,\infty )\]

E)  None of these