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If f: RtoRa n dg: RtoR are two functions...

If `f: RtoRa n dg: RtoR` are two functions such that `f(x)+f^(primeprime)(x)=-xg(x) f^(prime)(x) and g(x)>0AAx in Rdot` Then the function `f^2(x)+(f'(x))^2` has
(a)a maxima at `x=0`
(b)a minima at `x=0`
(c)a point of inflexion at `x=0`
(d)none of these

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