I have the sum from n=1 to infinity of (2n)/4root[(n^8)+(2n^4)+1] i dont know which test to use...
H hgaon001 New member Joined May 17, 2009 Messages 39 Aug 4, 2009 #1 I have the sum from n=1 to infinity of (2n)/4root[(n^8)+(2n^4)+1] i dont know which test to use...
B BigGlenntheHeavy Senior Member Joined Mar 8, 2009 Messages 1,577 Aug 5, 2009 #2 Hint: \(\displaystyle n^{8}+2n^{4}+1 \ = \ (n^{4}+1)^{2}.\)
