I already posted this in the Applied section but I don't think thats actually the right place so here it is again!
I think I'm pretty close to getting this but can't quite figure out what do next!
From earlier in the question...
Show that erf(x) can be expressed in terms of the incomplete gamma function, and that the above asymptotic expansion agrees with the result obtained in Problem 6. [The formula (**) for integer n may be useful.]
So I think I have to show the relation... (***) as that's the relation I've seen elsewhere.
The result obtained in question 6 was...
Right so intro done!
Now what I've done...
(This step seems to be showing that which corresponds to (***))
But I'm stuck now. I need to do something to the but I'm not sure what... I don't even know if what I've done so far is right to be honest... Any help please!