Transposition: Transposition is a process of inverse operation, such as f (radical x+ 1)=x+2 radical x transposition t= radical x+ 1. According to the equation, the square of x =(t- 1) and the sum of squares of f (t- 1) are obtained. And because the root number x+ 1=t, the square of F (T) = (T- 1)+2 (T- 1) = (t≥ 1). In fact, t is just a number here, just a number. As long as the numbers are the same, then f (x) = f (x) = the square of x-1(x≥ 1), where x and t are equivalent collocation: collocation can also be understood as a disguised substitution. For example, f (root number x+ 1)= root number x squared +2 root number x+ 1- 1 = (root number x+ 1) de squared-1 Here is the root number x+1= X.

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