- #1
pleasehelpmeno
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Homework Statement
Hi I have two questions related to the above topic.
1)I am trying to practice this technique and am stuck on a couple of problems, one is in taking
a)[itex]\sqrt{10-\left(\frac{y}{x\sqrt{1+\frac{y^2}{x^2}}}\right)}[/itex] asymptotically as [itex]y\rightarrow -\infty [/itex]
b)[itex]\exp\left(\pm i \int_{x_0}^{x} \sqrt{f(x)}dx\right), \mbox {as } \rightarrow \pm\infty [/itex] [itex]f(x)=\sqrt{a^2 + a^{2}\frac{y^2}{x^2} } [/itex]
I know the answers are just a)[itex] -\frac{y}{x \sqrt{2}} [/itex] and b) [itex] (\frac{2y}{x})^{\pm ip^{2}/2}e^{\pm \frac{iy^{2}}{2}}e^{\pm \frac{ip^{2}}{4}}[/itex]but when trying to find it I just get stuck.
If this is in the wrong section I apologise, and can someone please redirect it thanks.
The Attempt at a Solution
I have attempted to simplify expression a) but only end up with the same answer that i get for +infinity which is:[itex] +\frac{y}{x \sqrt{2}} [/itex] and isn't correct.
As to b) I don't really know what to do because of the integral being present.