Use the methods of the previous problem to find an asymptotic expansion for the integral of from x to ∞, when x ≫ 1.

Step 1</p>

The asymptotic expansion of the function is given by the formula

I(x) = dt

The power series expansion of the function is given by

= 1- xt + x2t2 +.......................+(-1)nxntn +...............

Step 2</p>

So I(x) = t2 e-t^2 [ 1- xt + x2t2 +.......................+(-1)nxntn +.........] dt