Evaluation of Definite Integral - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: HP Prime (/forum-5.html) +--- Thread: Evaluation of Definite Integral (/thread-10002.html) Evaluation of Definite Integral - MullenJohn - 01-23-2018 03:57 PM I am getting definite integral answers which are off by one decimal place. For Example: Evaluate this definite Integral from zero to 1 and I should get approximately 0.620 but I am getting 0.0620 EVAL( CAS.int( ∫1...0 (e^x)/(1+e^x ⅆx ) Does anyone know why I am off by a decimal place? Also EVAL( CAS.int( ∫1...0 (e^-x) ⅆx ) should be approximately 0.6321 but I am getting 0.06321. Thanks - Cheers! I am doing this from the HOME Display. RE: Evaluation of Definite Integral - salvomic - 01-23-2018 04:14 PM hi, you can avoid to use EVAL() and CAS.int: simply input the integral via the template via shift-C key... otherwise control better how to input via EVAL() using Catalog to input int() and use X (upper, D key, and not lowercase), don't input "by hand", because it could be a little (still not well documented) bug in the present version of FW that produce "d1" or something instead of dx, when there are spaces, I think. With Template (or EVAL() and int() via Catalog) you get the correct answer. If still there is error, purge the X variable. Salvo RE: Evaluation of Definite Integral - MullenJohn - 01-23-2018 09:37 PM Thank you Salvomic - It works for me now - Cheers! RE: Evaluation of Definite Integral - salvomic - 01-23-2018 10:00 PM (01-23-2018 09:37 PM)MullenJohn Wrote:  Thank you Salvomic - It works for me now - Cheers! Well! ciao