Question about Texas Instruments TI-84 Plus Calculator

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The following should help draw several graphs.

When you enter a function you should press [ENTER] to validate. At the same time, the cursor moves to the next line. Verify that the = sign on the equation already entered is still highlighted.

If for some reason the = sign of an equation is no longer highlighted, use arrow keys to move cursor on the = sign and press [ENTER].

If only one = sign remains highlighted and all others are not, then in all probability
the application Transfrm has been executed before and is still lingering in RAM. When in RAM, it
takes over the graphing capabilities of the native OS. This prevents you
from drawing more than one graph.You must unload it from memory.

- Press the [APPS] key.
- Scroll down to the line that shows Transfrm.
- Highlight it and press [ENTER].
- In following screen you are invited to Uninstall or continue.
- Press the number to the left of Uninstall. Validate if need be.
- Return to the Y= editor to type in functions to graph.

Posted on Oct 19, 2010

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Posted on Jan 02, 2017

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To have any meaning, the x variable must be in radians.

To find the solutions of this equation you can graph the functions

y_1=x*sin(x)

y_2=0.1

Graph the two functions and find the intersection points of the two.

Because the two functions are even F(-x)=F(x), it suffices to consider their intersections on the interval [0, + infinity[

There are many solutions (an infinite number of them)

See some screen captures below.

After the graphs are drawn, use the G-Solve feature to find the intersections.

To find the solutions of this equation you can graph the functions

y_1=x*sin(x)

y_2=0.1

Graph the two functions and find the intersection points of the two.

Because the two functions are even F(-x)=F(x), it suffices to consider their intersections on the interval [0, + infinity[

There are many solutions (an infinite number of them)

See some screen captures below.

After the graphs are drawn, use the G-Solve feature to find the intersections.

Jan 09, 2014 | Casio ClassPad 300 Calculator

In theory yes. If you have a function y=f(x) and another y=g(x), an intersection point of the graphs of the two functions,** if it exists, **is a point (x_i,y_i) such that **f(x_i)=g(x_i)**.

Graphically this means that**(x_i, f(x_i))=(x_i, g(x_i))**: The two curves pass through the same point in the Cartesian plane.

Now consider**f(x_i)=g(x_i)**. That is an equation in x_i, or lest us just drop the _i to shorten and write f(x)=g(x), or **f(x)-g(x)=0**.

If you can feed it to the SOLVER in**EQN**, the equation mode, and the calculator gives you the roots of the equation, then for each root x_i found you have an intersection point (x_i, f(x_i)), or (x_i, g(x_i)). You can use either function to calculate the y-value since the two functions are supposed to be equal at the root x_i.

**However it is much simpler to do with a graphing calculator.**

Graphically this means that

Now consider

If you can feed it to the SOLVER in

Oct 05, 2013 | Casio Office Equipment & Supplies

In theory yes. If you have a function y=f(x) and another y=g(x), an intersection point of the graphs of the two functions,** if it exists, **is a point (x_i,y_i) such that **f(x_i)=g(x_i)**.

Graphically this means that**(x_i, f(x_i))=(x_i, g(x_i))**: The two curves pass through the same point in the Cartesian plane.

Now consider**f(x_i)=g(x_i)**. That is an equation in x_i, or lest us just drop the _i to shorten and write f(x)=g(x), or **f(x)-g(x)=0**.

If you can feed it to the SOLVER in**EQN**,
the equation mode, and the calculator gives you the roots of the
equation, then for each root x_i found you have an intersection point
(x_i, f(x_i)), or (x_i, g(x_i)). You can use either function to
calculate the y-value since the two functions are supposed to be equal
at the root x_i.

**However it is much simpler to do with a graphing calculator.**

Graphically this means that

Now consider

If you can feed it to the SOLVER in

Oct 05, 2013 | Casio FX-115ES Scientific Calculator

Draw the graphs
of the functions you are interested in. While the graphs are displayed
Press the Menu key. In the drop down window locate the sub menu Settings
(number 8 or 9) depending on your calculator

The following screen is displayed with at the top the setting Float.

Follow the right pointing arrow on the same line as float and select Float 3 or 4 as on the screen capture that follows

Point to the graph of one of the functions select it then press the menu select option Analyze graph then intersection.

You will be asked to select the second function, then the lower bound and upper bound. As you see on the previous screen capture, the coordinates of the intersection point are given with 3 decimal digits.

The following screen is displayed with at the top the setting Float.

Follow the right pointing arrow on the same line as float and select Float 3 or 4 as on the screen capture that follows

Point to the graph of one of the functions select it then press the menu select option Analyze graph then intersection.

You will be asked to select the second function, then the lower bound and upper bound. As you see on the previous screen capture, the coordinates of the intersection point are given with 3 decimal digits.

Apr 27, 2013 | Office Equipment & Supplies

Draw the graphs of the functions you are interested in. While the graphs are displayed Press the Menu key. In the drop down window locate the submenu Settings (number 8 or 9) depending on your calculator

The following screen is displayed with at the top the setting Float.

Follow the right pointing arrow on the same line as float and select Float 3 or 4 as on the screen capture above.

Point to the graph of one of the functions select it then press the menu select option Analyze graph then intersection. You will be asked to select the second function, then the lower bound and upper bound. As you see on the previous screen capture, the coordinates of the intersection point are given with 3 decimal digits.

The following screen is displayed with at the top the setting Float.

Follow the right pointing arrow on the same line as float and select Float 3 or 4 as on the screen capture above.

Point to the graph of one of the functions select it then press the menu select option Analyze graph then intersection. You will be asked to select the second function, then the lower bound and upper bound. As you see on the previous screen capture, the coordinates of the intersection point are given with 3 decimal digits.

Apr 27, 2013 | Texas Instruments TI-Nspire Graphic...

Just open the Y= editor, and type in the two functions, one on each line. Make sure that the = signs remain highlighted when you move cursor on some other lines (Y3, or Y4).

Then open the Window utility and set Xmin=0

After graphs are drawn you can use the CALC utility to find the Intersection of the two lines.

Then open the Window utility and set Xmin=0

After graphs are drawn you can use the CALC utility to find the Intersection of the two lines.

Jan 29, 2013 | Texas Instruments TI-84 Plus Calculator

The solve( function was not able to find the intersection point because it lies outside the graph range. The window dimensions are too narrow to contain that point. I suggest you restrict the graph to the quadrant where you suspect the solution to be (example first quadrant if appropriate) : take Xmin=0, Ymin =0 and choose Xmax and Ymax large enough to enclose the intersection point.

Sep 11, 2011 | Texas Instruments TI-84 Plus Silver...

Graph both lnx and -7x and then go to the graph. Once there, press 2nd then calc and scroll down to where it says "Intersect", select that, select a point on each line, and press enter and it should give you the intersection point.

Mar 25, 2011 | Texas Instruments TI-84 Plus Silver...

simply divide the function by the domain you wish.

In your example, you wanted to graph y=x for x>=0.

You should graph the function f1=(x)/(x>0)

To find out when y=900, graph the function in f1, and then graph the equation y=900 (which will be a horizontal line) and use the intersect function to find where they cross. The x-coordinate of the intersection is the solution you are seeking.

In your example, you wanted to graph y=x for x>=0.

You should graph the function f1=(x)/(x>0)

To find out when y=900, graph the function in f1, and then graph the equation y=900 (which will be a horizontal line) and use the intersect function to find where they cross. The x-coordinate of the intersection is the solution you are seeking.

Jan 25, 2011 | Texas Instruments TI-Nspire Graphic...

I believe I already showed you with a profusion of details how to graph functions on the calculator. It would very kind of you to refer to the post that answered your question, so as not to make us answer it all over again. Much appreciated.

Read the following to use the intersection function.

Here are some screen captures

Read the following to use the intersection function.

- You draw two or more graphs.
- After the graphs are displayed, press [2nd][TRACE] to access the (CALC)ulate menu.
- Select [5:Interesct]
- You will be prompted for a first curve: the equation of the curve will be displayed at the top left corner of the screen. If it is one the intersecting curves, press [ENTER]
- You will be prompted for the second curve. (You can move from one curve to another by pressing the UpArrow or DownArrow).
- After two curves are selected, you will be prompted for a guess for the X-value of an intersection point: you can use the keypad to enter a guess or use the left or right arrow to move the cursor towards a point of your choosing (if there are more than one point).
- After a short while the calculator gives you a solution.
- If it fails, you must make a better guess.

Here are some screen captures

May 12, 2010 | Texas Instruments TI-83 Plus Calculator

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