## The function $$F$$ is defined for all positive integers $$n$$ by the following rule: $$f(n)$$ is the number of positive

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### The function $$F$$ is defined for all positive integers $$n$$ by the following rule: $$f(n)$$ is the number of positive

by VJesus12 » Thu Apr 15, 2021 11:51 am

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A

B

C

D

E

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The function $$F$$ is defined for all positive integers $$n$$ by the following rule: $$f(n)$$ is the number of positive integers each of which is less than $$n,$$ and has no positive factor in common with $$n$$ other than $$1.$$If $$p$$ is any prime number then $$f(p)=$$

A. $$p-1$$

B. $$p-2$$

C. $$\dfrac{p+1}2$$

D. $$\dfrac{p-1}2$$

E. $$2$$