If \( f:(-\infty, 2] \longrightarrow(-\infty, 4] \), where \( f(x)=x(4-x) \), then \( f^{-1}(x) ...
If \( f:(-\infty, 2] \longrightarrow(-\infty, 4] \), where \( f(x)=x(4-x) \), then \( f^{-1}(x) \) is given by :
(a) \( 2-\sqrt{4-x} \)
(b) \( 2+\sqrt{4-x} \)
(c) \( -2+\sqrt{4-x} \)
(d) \( -2-\sqrt{4-x} \)
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