If n is the square of a positive integer, which of the following must be equal to the square of the next positive integer?
.  Pick one:
A) √n + 1	B) n + 1	C) n^2 + 1	D) n + 2√n + 1	E) n^2 + 2n + 1
Let a= +ve integer such that   n= a^2   (a+1)= next +ve integer   (a+1)^2 = a^2 + 1 + 2a   and a=n^(1/2)   Therefore ,   (a+1)^2=n+1+2*n^(1/2)   Answer n + 2√n + 1
<result>D</result>
If n is the square of a positive integer, which of the following must be equal to the square of the next positive integer?
.