HP 15C and INT(1/√(1x),0,1)

11272017, 09:38 AM
(This post was last modified: 11272017 09:57 AM by salvomic.)
Post: #5




RE: HP 15C and INT(1/√(1x),0,1)
(11262017 11:01 PM)Dieter Wrote: What are the two ENTERs supposed to do?hi Dieter, you are right! Without the ENTER I get 1.9999 in iOS in about 2 min (1 min with SCI 4). In hardware HP15C no result after 27 min now with your program. I controlled that all was ok with ON/y^x procedure (all flags and 88.88.88.88.88), I reset also the continuous memory (ON/) but the same with FIX 4, with FIX 2 I get 1.99 after about 3 mins Quote:...Nothing, FIX 4. I thought there was something wrong in Reg but it seems not. Quote:Set FIX 4, and the official HP emulator returns 1,9999 almost immediately.ok here in iOS. Also SCI 4 got 1.9999 after 1 min. However not in hardware: this is strange by me: FIX 4 and nothing happens after 27 min, also with SCI 4... Quote:Answers to both questions can be found in the 15C Advanced Functions Handbook which explains the Integrate function in detail. Take a look at the graph near x=1 and you'll see why this integrand is not trivial and why you should not expect a plain 2. As x approaches 1 the function approaches infinity. The AFH shows how such cases can be handled. Thanks! I'll look there. The integral isn't trial at all. (11262017 11:13 PM)peacecalc Wrote: Hello Salvo, thanks a lot! also your contribute is important for me. (11272017 01:33 AM)Carsen Wrote: Good evening (at least where I live)well, in Exact in 50g I missed EVAL... Using it with EQN editor I get 2 immediatly, but with std setting in "number format" mode no luck after a few minutes. With FIX 4 I got the result 1.9999 in less than 3 min. Quote:Next I tested your integral on my Dad's (hardware 1987) HP15C. I entered the equation as such...the same as the Dieter program, here: ok in iOS, nothing after various minutes in Hardware... Quote:Then I set the 15C to a fix of 4 and attempted to integrate the integral again. In a time of 16 minutes and 28 seconds, I stopped the 15C and didn't get an answer as a result.In fact! Quote:I can't give any advice as I am not a proficient user of the HP15C ONLY because I don't own one yet. But I hope my input on how I solved the integral on my calculators (and my Dad's) proved useful. Oh and I can help with the HP 50g. I would say I am a solid user of the machine.thank you! HP 50g is a very "big" machine, precise and solid, indeed. I like it (also I like the Prime). Salvo ∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C  DM42, DM41X  WP34s Prime Soft. Lib 

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