- #1

ComFlu945

- 9

- 0

so the original equation is:

u= [ (x^2 – 1)^1/2 + ln (x + (x^2 – 1)^1/2 )]

and we let x=z+1.

Then by simplifying and approximating, u=z*2*2^.5 + higher order terms

from my notes: (x^2 – 1)^1/2 = (2z)^.5*(1+z/2)^.5

ln(1+e) approximately = e