Texas Instruments Announces New Calculator
S. Kinney writes "TI recently announced the development of a new calculator, known as the Voyage 200, to replace the TI-92+. The software changes are rather minor, as the device is designed to be compatible with the 92, though the addition of a clock makes the Voyage more functional for some, and the case of the device enjoys a new design. Perhaps the most useful upgrade to the 92+ is the addition of more memory, for a sum of 2.7 MB of storage. No word on release date, but it'll be interesting to see how this comes out. It may be one more step towards releasing a modern-day Avigo, their failed PDA from a few years back. "
I would have never gotten through my long lectures without my handy tetris playing calculator.
Yeah, I wonder why anybody does math with infix notation. Why can't they teach clearly more intuitive formulas like:
0 1 e i Pi * ^ + =
or:
u v * ' u ' v * v ' u * + =
in school....
Ok, wise guy. =) Provide me with numerical coordinates for the intersection(s) of the following two equations. You can't use any mechanical aid to calculation (no slide rules OR electronic calculators). You can reference tables in books, provided you also prove that particular entry you use is correct.
y = -0.437(x^3) - 1.42(x^2) + 4.84(x) - 12
y = 13.9 sin(8.16x) + 2.4
Note that a calculator geek will provide an answer with the appropriate number of significant digits in about five minutes. I imagine you will find this impossible given the restraints above. If not, then I want to shake your hand.
Traditional (ie non-calculator) textbooks and teaching techniques generally pick "nice" numbers for problems. They do this because it is unrealistic to expect the student to produce correct answers in a reasonable period of time, and to do that for all the odd problems on the page, and to do that in one evening, along with all your other homework. However, this is completely unrealistic; NO problems encountered outside the classroom have "nice" numbers unless they are specially constructed.
However, with calculators, you can solve "real-world" problems, using realistic (multi-digit, non-integral) numbers. This is useful both for practical reasons (students aren't shocked when they encounter REAL problems) and for motivational ones (no more students asking "When will we have to factor x^2-9 in the real world?")