Mathematics 1 Deneme Sınavı Sorusu #1212136

Given that f : R› R, f (x) = 3x + 5 which of the following equals to f-1 (2)?


1

2

3

4

5


Yanıt Açıklaması:

It is clear that this function has an inverse. Hence, for finding f-1 (x), we write y = 3x + 5. What we find is x = (5 - y) / 3. Then, f-1 (x) = (5 - y) / 3. Substituting 2 with x, we find 1.  

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