Consider following definition of function. f: X→X, f(x)≡(3x+11) mod 26, where X={0,1,2,....25}. Note that GCD(3,26)=1. If f-1(x)≡c(x-11) mod 26, where 3x≡1 mod 26 then the value of c is

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Chapter2: Second-order Linear Odes
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Consider following definition of function.

f: X→X, f(x)≡(3x+11) mod 26, where X={0,1,2,....25}.

Note that GCD(3,26)=1. If f-1(x)≡c(x-11) mod 26, where 3x≡1 mod 26 then the value of c is 

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