Answer is: option3
III onlySolution:
A graph is symmetric about the x-axis if:
\( f(x) = -f(x) \)
This means the function would pass the horizontal line test, i.e., for each \( x \), \( f(x) = -f(x) \), which implies:
\[ xe^{-x^2} = -xe^{-x^2} \Rightarrow 2xe^{-x^2} = 0 \Rightarrow x = 0 \]
This is only true at \( x = 0 \), not for all \( x \), so the function is not symmetric about the x-axis.
A graph is symmetric about the y-axis if:
\( f(-x) = f(x) \)
Try plugging in \( -x \):
\[ f(-x) = (-x)e^{-(-x)^2} = -xe^{-x^2} = -f(x) \]
So \( f(-x) = -f(x) \), not equal to \( f(x) \), so it's not symmetric about the y-axis either.
A graph is symmetric about the origin if:
\( f(-x) = -f(x) \)
From above, we found:
\( f(-x) = -f(x) \)
✅ This is true — so the graph is symmetric about the origin.
(C) III only.