Question

let f be afunction f:n n be defined by f(X)=3x+2 x€n
find the image of 123
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Answer 1

Answer:

clearly , f(x) = 3x + 2

      f(1) = 3 + 2 = 5

      f(2) = 6 + 2 = 8

      f(3) = 9 + 2 = 11

hence ,  image of 1 , 2 , 3 : - 5 , 8 , 11