Correct answer is C.
\(\text{f(x)}=\frac{\{\text{x}(\text{x + 1})\}}{e^\text{x}}\)
Differentiating the function with respect to ‘x’,
Using Sridharacharya Formula, In a general equation, ax2 + bx + c = 0
So the required value of c = \(\frac{1-\sqrt{5}}{2}\) Є (-1, 0).