Message #10 Posted by Frank Boehm on, 4:18 p.m.,Īt least "0" is not offered as a solution Whoops! The Illinois method is a modification of the false position method, not the (admittedly quite similar) secant method. Message #9 Posted by Les Wright on, 9:05 p.m., As for the PPC manual-how could it avoid some mistakes, as the thing is a monster!
I don't believe everything was perfect in the golden olden days. It is shorter and seems to work better than the adaptation of Newton's Method that is offered in the 11C manual. I have easily shaved it down to 59 steps from the original 75, and have easily adapted it to the 11C. It uses the Illinois modification of the secant method, and as such is a pretty good routine.
#Ti nspire solve quadratic equation code#
The code works, but it seems to include redundant steps (i.e storing interim results that are never again recalled) and has a lot of inefficient filler. Recently, I have taken interest in the Root Finder code in the HP41 Standard Applications Pac. Discovered after getting wonky results for the Hofstee plot option that several steps intended to transform certain regression coefficients were just plain wrong in the listing and, I have discovered now that I have a wand, in the barcode. When I was student I had occasion to actually try to use the Enzyme Kinetics program in the Chemistry User Solutions Book. Message #8 Posted by Les Wright on, 8:41 p.m., Misspelled a "shields" prompt as "sheilds" Message #7 Posted by Gene on, 12:53 p.m., Maybe things weren't so pristine in the olden days after all.
#Ti nspire solve quadratic equation manual#
The second correction explains that "The Bonds program does not correctly calculate the yield of a short-term bond" and provides a method to remedy the problem.Įven earlier, the HP-27 Owner's Handbook (00027-90012 which does not have a date on the card) provided corrections to three pages of the manual (00027-90001) which was printed in January 1976. The first correction explains that "the prompts for the Modified Internal Rate of Return (MIRR) were inadvertently reversed". The HP-41C Financial Decisions Pac Addendum Card (00041-90273 3/80) printed in March 1980 provided two corrections which applied to both the original manual (00041-90042) and to the Revision B manual printed in January 1980. maybe 1993 isn't "old" in the sense of classic HP the attention to detail in the product literature was slipping by then.) I am not sure I edited the scan I sent to Dave to be included in the next DVD. I placed a pair of parentheses by hand on the brochure. The same picture appears in old 48 boxes, I think. But I found that HP mistake interesting to show here. When Jan said "old HP advert" he surely was neaning "prior to 1986". In response to message #4 by Karl Schneider Re: Error in 1993 Equation Writer brochure The HP-48 Equation Writer helped to avert errors such as these, but it's kind of a chore to enter a graphical expression using the cursor arrows.
Therefore, it is difficult to ascertain whether the entered expression was correct, yet the user is expected to trust the final result returned by hitting "=". This is an example of my basic objection to EOS calculators: The expression you see in the display (which is often cropped) just doesn't match the graphical expression on the paper. The error I see in the algebraic expression is that 2*pi should have been parenthesized, so that the square root would be applied to both numbers. (On the other hand, maybe 1993 isn't "old" in the sense of classic HP the attention to detail in the product literature was slipping by then.) Message #4 Posted by Karl Schneider on, 3:14 p.m., This would not have happened in an old HP advert.ĭon't be so sure of that. This would not have happened in an old HP advert. Didn't their previous graph of teh parabola clue them in to the wrong solutions? Hmmm? It seems we have a new form for the quadratic formula (screen shot #5). Message #1 Posted by Chuck on, 3:23 p.m.ĭon't you just hate bad math? Check out TI's website on the Nspire. TI Nspire and Bad Math The Museum of HP Calculators
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