_________ \/ 2*x + 1 -----------*2 2*x + 1
(sqrt(2*x + 1)/(2*x + 1))*2
2/sqrt(1 + 2*x)
2 ----------- _________ \/ 1 + 2*x
2.82842712474619*(0.5 + x)^0.5/(1.0 + 2.0*x)
_________ 2*\/ 1 + 2*x ------------- 1 + 2*x
2*sqrt(1 + 2*x)/(1 + 2*x)