8/24/2014 Point (2, 3) lies on the graph of the inverse of f(x) = = 2x3 + x + A. The value of A is:
a) -54   b) -15  c) 15  d) 18  e) 54



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8/24/2014 Solution. B. Since (2, 3) lies on the inverse of f(x), the point (3, 2) lies on f(x)! Substitute and find A = -15.