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Given x = 3 on the inverse of f(x)=1/3x+5, what is the y-value? would you use the algebraic method?

Brianna068

by Brianna068 at June 20, 2010

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The inverse of f(x) = 1/3 x + 5 would be equal to switching the x and y (independent and dependent variables) and then solving for y.The first step in finding the inverse is switching the x and y (to see the problem easier, f(x) = y).x = 1/3 y + 5Since the x value is given, substitute 3 for x.3 = 1/3 y + 5Now the function must be solved for y.-2 = 1/3 y-6 = ySo, the y-value for x = 3 of f^-1(x) is -6.

Azaler Azaler June 21, 2010

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