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Thank you very much.
Hi Carter, The lower case gamma denotes the lower incomplete gamma function while the one with the upper case denotes the complete gamma function.
This has been given to us by our school and it gives me the final result I am looking for. It can be solved numerically, however, I need its symbolic or approximated solution. I do not know how to get its exact or approximated solution.
I greatly appreciate your support. Thank you very much.