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Define a function phi : N to N as follows : phi(1)=1,phi(P^(n))=P^(n-1)(P-1) if P is prime and n in N and phi("mn")=phi(m)phi(n) if m & n are relatively prime natural numbers phi(8n+4) where n in N is equal to |
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Answer» `2phi(4n+2)` |
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