Shingles - causes, symptoms, treatment, vaccination. Shingles is a viral infection, the first symptom of which is usually a tingling, sharp, burning pain under the skin, followed after 1-3 days by a red rash and blisters. Shingles is caused by the same virus as chickenpox (varicella zoster).
Rating: Be the first to rate this item. O.F.A.C. stands for the Office of Foreign Assets Control and is a part of the U. S. Department of the Treasury. The following definition was found on the OFAC web site:
In this case, f(x) is a function, but f-1(x) is not a function. Function #1, f(x) is not a one to one function because it does not pass the horizontal line test. f-1(x) is not a function. In this case, f(x) is a function and f-1(x) is also a function.