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If f(r)(x), g(r)(x), h(r) (x), r=1, 2, ...

If `f_(r)(x), g_(r)(x), h_(r) (x), r=1, 2, 3` are polynomials in x 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'(x) at x = a is ..... .

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