Let f be a real-valued invertible function such that f2x-3x-2=5x-2,x≠2. Then the value of f-113 is
We have f2x-3x-2=5x-2 or f-15x-2=2x-3x-2 Let 5x-2=13. Then x=3 Hence, f-113=23-33-2=3.