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In x = t dt You may recall that logarithmic functions have a product property: In xy = Inc + Ing To see why this property is true using the integral definition, first use properties of integrals to write In xy = at this way cy at + / it + and in the last integral make the substitution u = Changing the limits of integration in the last integral, when t - a we have u 1 and when t = xy we simplify to get u Part 2 of 3 Since u = then we can write t in terms of u and x as t SO