In the formula X = 1/(2y+1)^2, if y is halved, then X is multiplied by	Choose the correct choice from the following:
A) 25/9
B) 25
C) 1/9
D) 1/25
E) 9
Say y=2 =&gt; X1 = 1/25   when y=1; X2 = 1/9   X2 = 25/9*X1.   25/9nswer : 25/9
<result>A</result>
In the formula X = 1/(2y+1)^2, if y is halved, then X is multiplied by