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If fr(x),gr(x),hr(x),r=1,2,3 are polynom...

If `f_r(x),g_r(x),h_r(x),r=1,2,3` are polynomials such that `f_r(a)=g_r(a)=h_r(a),r=1,2,3 and` `F(x)=|[f_1(x),f_2(x),f_3(x)],[g_1(x),g_2(x),g_3(x)],[h_1(x),h_2(x),h_3(x)]|` then `F^(prime)(x) at x=a` is____________________

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The correct Answer is:
F'(a)=0
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