Tinspire CAS help!

[Hielly]

Hey

How would you sketch f(x)= on the same axes as f'(x) without first differentiating by hand. I tried typing f'(x) but it didn't work. How would you go about it?

Thanks

[ZachCharge]

I would just get the CAS to differentiate the equation in the calculator screen (menu:4:1), then either define the answer or copy and paste it into graph screen where the function is sketched.

Basic steps:

1. Create a calculator page.
2. Press the menu button, then press 4, then one to use the differntiate function.
3. Type in the appropriete term that you are differentiating (usually x) so the calculator shows
4. Use the arrow buttons to move into the brackets. Type in the function you want to differentiate and press enter to get the answer.
5. Create a graph page.Next to , type in the original function to sketch and press enter.
6. Go back to the calculator page (ctrl left) and copy (ctrl c) the differentiated function.
7. Go into the graphs page (with the function already sketched). Press the tab button to get back into the equation area. It should be on (if not press down).
8. Paste the differentiated function and press enter to sketch.

Alternatively, as stated below, you can define the function and its derivative and enter what you have defined  into the graphs screen instead of copying and pasting.

[stonecold]

Go to calculator, menu, calculus, derrivative and type the eqn.  this give the derivative function.
then define it as g(x) for example. Type  "Define g(x)=[put derivative here]".  Press enter to define it.

then when you go to graphs, type in g(x) and the differentiated equation will be graphed

[the.watchman]

Nah, I reckon it's easier to sketch the function under or whatever

Then write into the next slot

Then you won't have to differentiate first!

[stonecold]

^^^

nice tip, thanks!

[Hielly]

okay thanks!

What about this on the calc

[cipherpol]

okay thanks!

What about this on the calc

define . Go to the graphing screen then type your equation followed by: |-0.5<x<0.5

[the.watchman]

okay thanks!

What about this on the calc

define . Go to the graphing screen then type your equation followed by: |-0.5<x<0.5

Or define the function with the x restriction incorporated

[lakersfan_10]

okay thanks!

What about this on the calc

define . Go to the graphing screen then type your equation followed by: |-0.5<x<0.5

Or define the function with the x restriction incorporated

The problem with the TI-Nspire is that when you enter in functions like this, it gets extremely slow, when you need to graph trace, bring up a table of vales etc

[the.watchman]

If you cbf table of values (which i NEVER use), just sketch the function, switch back to calc mode
The function is automatically defined (as f1(x) etc.), so you can find specific values or solve for x much easier

[Hielly]

i should have typed the whole question out.

Consider the function
Plot the graph of g(z) when:

[the.watchman]

i should have typed the whole question out.

Consider the function
Plot the graph of g(z) when:

g(z) If that's right, then it's exactly the same, but with z on the x-axis and g on the y-axis (or just y)

[m@tty]

i should have typed the whole question out.

Consider the function
Plot the graph of g(z) when:

g(z) If that's right, then it's exactly the same, but with z on the x-axis and g on the y-axis (or just y)

It wouldn't be g on the vertical axis would it? I thought it would be g(z).

[the.watchman]

i should have typed the whole question out.

Consider the function
Plot the graph of g(z) when:

g(z) If that's right, then it's exactly the same, but with z on the x-axis and g on the y-axis (or just y)

It wouldn't be g on the vertical axis would it? I thought it would be g(z).

You can label it g or g(z), it doesn't matter too much
However, if you continue with y, then be sure to label the graph y=g(z) (I much prefer this way, it means you don't have to write the whole equation out!)