Why Is My TI-89 Giving Infinity for Log-Normal PDF Integration?

[oneamp]

I am using the PDF for log-normal distribution, which I'm referencing off the wikipedia page:
here. I am integrating from 0 to infinity with my TI-89. It is not giving me 1, as I'd expect from a PDF, but is giving me infinity. Here is how I'm entering it in the calculator (I've tried a few variations):

e^(-((ln(x-1))^2/2))/(sqrt(2*pi)*x)

mu and sigma are one, so it simplifies to this. What is going on :(

Also I just tried integrating from 0 to 12, and it also says infinity. I guess I am doing something wrong :(


Thank you

 

[mathman]

Your exponent is wrong. It should be ((lnx - 1)²)/2.

 

[oneamp]

thank you