If y is not equal to zero, and y+1/y = 2, then what is the value of y^4 + (1/y)^4?	Options
A) 2  B) 4  C) 5  D) 8  E) 0
y + 1/y=2   we square both sides so we have y^2 + 1/y^2 +2 = 4   or y^2 + 1/y^2= 2   squaring again we have y^4 + 1/y^4 + 2 = 4   or y^4 + 1/y^4 = 2   answer =2 (2)
<result>A</result>
If y is not equal to zero, and y+1/y = 2, then what is the value of y^4 + (1/y)^4?