Tips for using the Casio fx-9750GIIIn order to be successful in the upper maths offered from the House of Lee, you will need to prove your technological competency with your graphing calculator. These aides will assist you in accomplishing that goal. It is no good to have a tool if you cannot use it! The following instructions will work with the Casio fx-9750GII and with other models of Casios; however, slight variations may exist on other models. Feel free to contact me if you have questions on your specific calculator if you are not sure how to use it.
These competencies are based on the International Society for Technology in Education (ISTE) standards for Students 1c - Students use technology to seek feedback that informs and improves their practice and to demonstrate their learning in a variety of ways.
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1) Use technology to find zeros/roots/x-intercepts of polynomials second degree and higher.
Example: Find the roots of f(x) = 2x² + x - 7.
1) Start by pressing MENU. This will bring up the main menu.
2) Choose option 3 "Graph" by either pressing the number 3 or by using the arrow keys and pressing EXE.
2) Choose option 3 "Graph" by either pressing the number 3 or by using the arrow keys and pressing EXE.
3) Enter the function into Y1. Be sure to use the X button directly below the red ALPHA button to enter X. When finished, press EXE.
4) To graph the function, choose "DRAW" or F6.
4) To graph the function, choose "DRAW" or F6.
5) If you can see the entire graph, there is no need to adjust your viewing window. This image was displayed with the standard [-10, 10] viewing window.
6) To find the roots (which may also be called zeros or x-intercepts), select the "G-Solv" menu by pressing F5.
6) To find the roots (which may also be called zeros or x-intercepts), select the "G-Solv" menu by pressing F5.
7) A menu will appear at the bottom of the screen that corresponds with the gray function keys (F1-F6)
8) Activate the root finding function by pressing F1 under "ROOT."
8) Activate the root finding function by pressing F1 under "ROOT."
9) The first root on the screen will be marked on the screen. The function will be displayed at the top of the screen. The X= is one of the roots. Notice "ROOT" is in the right side of the screen to indicate the calculator is in root-finding mode.
10) In this problem, you'll notice there are two roots. To get the other root, simply press the right arrow.
10) In this problem, you'll notice there are two roots. To get the other root, simply press the right arrow.
11) The screen will update to show the other root.
The roots of this function are about X = -2.1375 and 1.6375.
12) When you've found all of the roots, press EXIT.
The roots of this function are about X = -2.1375 and 1.6375.
12) When you've found all of the roots, press EXIT.
2) Use matrices to solve systems of linear equations using Gauss-Jordan elimination (reduced row-echelon form)
Example: Find the solution for the following system of linear equations:
2x + 4y = 8
16x + 2y = 10
1) Start by pressing MENU. This will bring up the main menu.
2) Choose option 1 "Run-Mat" by either pressing the number 1 or by using the arrow keys and pressing EXE.
To review the lesson that corresponds with this, click here.
2) Choose option 1 "Run-Mat" by either pressing the number 1 or by using the arrow keys and pressing EXE.
To review the lesson that corresponds with this, click here.