>Jerry Brodkey wrote: > >> One of my former students who is now starting to teach asked me the >> following question for which I don't have a good answer; >> >> On the TI-82: 10/5*2 equals 4 >> >> but 10/5(2) equals 1.
This is the (in)famous "implied multiplication" which takes precedence over division.
>> The order of operations rules that I've been using for twenty years would >> agree with the answer equal to one. Multiplication and division are >> "equal" in power and you work from left to right. The parentheses in this >> case don't change the order of operations.
OK. Not (in)famous--INfamous. TI just shouldn'ta done it. They did it to make sin 2x mean sin(2x)--noble goal, but caused problems, such as the one here. Graph the line "y equals one-half of x" via y1=1/2x. Ya get a hyperbola.
This feature (it is NOT a bug--it was carefully planned) is not present on the 83 and up but IS on the 85 (which predates even the 82).