First, enter each coefficient of each variable into a matrix. You can do this by press [2nd][x⁻¹](Matrix) > Edit and choosing a matrix from the list. I'll use [A] in this example.
Set its dimensions to be 3×4, and enter each member as such:
[[ 1 2 5 -1]
[ 2 -1 1 2]
[ 3 4 -4 14]]
When you have all those entered in, exit back to the home screen.
In order to find the solutions to the system, you'll have to change the matrix to reduced row-echelon form. Fortunately, the calculator has an option to do that for you.
Select [2nd][x⁻¹](Matrix) > Math > B:rref(. Now, enter in [A] by going to [2nd][x⁻¹](Matrix) > 1:[A] and press [Enter]. You can then use the [Math] > 1:►Frac command to make the matrix a bit more readable. I get the following matrix:
[[ 1 0 0 2 ]
[ 0 1 0 4/7 ]
[ 0 0 1 -10/7 ]]
Therefore x = 2, y = 4/7, and z = -10/7.
Read the calculator manual.
1 , 4 , 2, 4, 4
Press APPS. Scroll down and select SciTools. The first option is the sig-fig calculator.
Press APPS. Scroll down and select SciTools. The first option is the sig-fig calculator.
It depends on the type of calculator you have. If you have a 8-digit calculator, the largest square number you can display is 99,980,001. If you have a 10-digit calculator, the largest square number you can display is 9,999,800,001. With a TI-84, you can display 9.999999999e99 (which is actually rounded).
The TI-89 is the better calculator. It has more functions than the TI-84, but is also more complex. Each is better for different situations or skill levels with calculators.
The TI-85 was the second graphing calculator made by Texas Instruments. (The first was the TI-81). The TI-84 is a much newer version and has more functionality and memory. The only real advantage that the TI-85 has over the TI-84 is that it costs less. As far as where you are allowed to use the calculator, almost every test or class that allows a TI-85 will allow a TI-84 as well. The TI-84 is a much better investment. (If the TI-84 is too expensive, look into getting a TI-83. This model is also newer than the TI-85.)
The TI-84 is a graphing calculater. It is mostly just an update to the TI-83 calculater.
Yes.
Yes, the TI-84 is allowed during the ACT.
Unfourtunately, it is not possible to expand with the TI-84. Only the TI-89 can expand polynomials.
Sorry, but no, to my knowledge there are no shells for the TI-84=CSE, and there probably will never be, the last descusions about being in 2006, and the TI-84+CSE is not compatible with the old TI-84 or even TI-84+SE programs. I am sorry to say but you will never have complicated games for this edition of the TI calculators but there are some simple games that don't need shells, such as tetris, worms etc:
You can play Ti-84 games with the 84 keypad but I have yet to find games for the n-Spire CAS. So just download TI-84 games and use the 84 keypad.
mram ti 84 sequences
there isn't an infity button on the ti-84 Texas instruments graphic calculator.
The two models have very different user interfaces. For most purposes, a TI-84 is easier to use and much more popular than the TI-86, and this may have been the reason the TI-86 was discontinued.
You cant factor on the ti-84. however the ti-89 does do this but its almost easier to just do it in your head. Plus on the ti-89 the way you enter it in there is a very high risk for error.