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F (x)=3×+1 solve for f (×)

User MrAlias
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f(x)=3x. Solution: If we take ln in both side of this equation and differentiate it, we get lnf(x)=ln3x. ∴ lnf(x) = xln 3. ∴ d dx. (lnf(x)) = d dx. (xln 3).
User MaxThom
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