If f is the square of a positive integer, which of the following must be equal to the square of the next positive integer? Choose the correct choice from the following.
A) √n + 1
B) n + 1
C) n^2 + 1
D) f + 2√f + 1
E) n^2 + 2n + 1
If f is the square of a positive integer, which of the following must be equal to the square of the next positive integer?   f = (x)^2 where x is a positive integer   To calculate -   (x+1)^2 = x^2 + 2x + 1   root(f) = x   Ans - f + 2 root(f) + 1   This should bef + 2√f + 1
<result>D</result>
If f is the square of a positive integer, which of the following must be equal to the square of the next positive integer?