So...I have a test tomorrow and have no clue how to do Row Echelon. We're suppose to use a matrix to solve equations with 3 unknowns. Yah so...anybody have an explanation on how to go about doing this?
Thanks,
Andy

 

good old TI-81?

Sorry man, it's been coming up on 8 years since pre-calc.

 

did you know satan created precalculus? you're actually in the act of worshipping satan if you're studying for this test.

don't do it.

 

 

what the heck is that

TI-83 & TI-89 is what got me through high school and college math, and it's still getting my through my major classes (Mechanical engineering)

thank god for the text commands, ha

 

TI81 is the one that started it all... i member having a program on there that created little pixalted movies... the **** ones were funny...

 

I still have my 81 somewhere with all my programs on it. Man that made calc nice and fun. I had programs with the formulas so the test were super easy.

 

im using my 84 in precalc and damn it makes it a breeze

 

i use a slide rule

 

http://www.mathwords.com/r/row-echelon_form.htm

Post the problem up. Linear is fun :D

 

i would love to help, but i honestly dont remember any of that stuff. maybe if i saw the problem. but i dunno.
i took pre-calc and ap calc in highschool.
3 years ago and i forgot it, i feel old

 

I am glad that a lot of my professors wouldn't allow calculators, except a basic one. I just graduated in ME last year, and you're going to be surprised at how much you need to know on the spot. With all the phone conferences, vendor/customer meetings and just everyday work, it really payed off to actually learn the material, not just learn how to do it.

 

Yeah but you see I know the material I just have some help to get through the rest. And yes I do know what it's like actually working since I am was a co-op and now am a part time employee at Newcomb and Boyd a large engineering consulting firm in Atlanta. I work in the HVAC and plumbing department and from what I've seen and heard so far just about all the work is on tables and graphs. But I do understand other focuses in ME would have to deal with things you're mentioning. But yeah I’m not just fartin’ around in college if that’s what your thinking.

 

No no no!

HP 9100A/B

The HP 9100A was Hewlett-Packard's first calculator. In the mid to late 1960's electronic four function fixed point calculators were brand new and typically cost $1000-$2500. In 1968 HP introduced the HP 9100A featuring:

Floating point math with a range of 10^-98 to 10^99
Log (natural and base 10)
Antilog (natural)
Square root
Trigonometric (including hyperbolic) functions and inverses
Vector addition/subtraction
Polar/rectangular conversion
Misc. features like 1/x, PI etc.
A logic system that could handle complex expressions (RPN)
Programmability
A magnetic card reader/writer
Options such as a printer and a plotter
The HP 9100, built with magnetic core memory, printed circuit board ROM, a CRT display (and not a single digital IC chip) provided industrial strength calculating in a machine that weighed 40 pounds and cost just under $5000. Hewlett-Packard had entered the young electronic calculator market in a big way.

 

Reverse Polock inputing is the best!

 

^^^ True. RPN is so much better.

 

Is this thread in English?