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f(x)=|{:(cos x, x, 1),(2sin x, x^(2), 2x...

` f(x)=|{:(cos x, x, 1),(2sin x, x^(2), 2x),(tan x, x, 1):}|." Then find the vlue of "underset(xrarr0)lim(f(x))/(x).`

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