# Can't see GeoGebra Applet on IPad

M.E shared this problem 5 years ago
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Why can't I see more than the headline on this on an IPad ?

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Hello

>> With Safari

>>with GeoGebra app

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Please can you post a screenshot?

Also maybe you can delete some of the test objects in your file (at the moment it has 207 elements)

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For screenshot, see the attached file below. This is taken from an IPad with OS 10.3.3 (14G60). Maybe the opdated version 11.1 solve the problem. I don't know.

This exercise and example generator and evaluator is quite extensive as it covers all the type of exercises that students may get at the written exam without any aids in math at gymnasium level B in Denmark in relation to differentiation.

So yes the file has quite many objects, which I also find necessary for this purpose.

And as most of the click boxes makes it possible not only to differentiate a special kind of functions, but to include these functions to make more complex functions to differentiate, it seemed necessary to create a lot of test sentences to be sure that the outcome of the random integer function match one of the selected click boxes. At first I tried with less, but that wasn't enough.

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Hi

The file works with my iPadAir1..

(except we don't have virtual keyboard in the app ??)

but yes problem > the app freeze or crash quickly

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It is a hardware problem

The file works very well on my iPhone 7+

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Hi again

You do many tests for a nice (right..) display

I have the same problem in my files.

See here

https://help.geogebra.org/t...

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@ M.E

If you create functions in CAS >> f(x):=...

you have automatically a nice display with a=-1, a=0 and a=1

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Well, the layout is not so fancy. But it's ok.

Tried to make it as simple as possible and still cover all the type of exercises that students may get at the written exam without any aids in math at gymnasium level B in Denmark in relation to differentiation.

How do you create functions in CAS so that the function can be seen in the algebra window ?

As you may see, I had to create some IF sentences so that -1x is viewed as -x, and so on.

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For polynomials the best way is to use:

1. Polynomial[f]

For other functions you can use these commands to get different forms:

1. Simplify[f]
2. PartialFractions[f]
3. Expand[f]
4. Factor[f]

(no need for the CAS View)

To display a CAS Cell in the Graphics View:

1. FormulaText[\$1]

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Hi M.E

Yes, you have so many tests for a nice display ( x instead of 1x,...)

The "problem" is that Michael's commands doesn.t work for all functions !!!

And they change the "form" !

Even create functions in CAS change form (with fractions instead of decimals)

So, with sqrt( a x) only, you can use Simplify (try with 1x or -1x or 0x it is ok)

But it doesn.t work for all functions

The best should be, for all functions have the simplification 1x with x, -1x with -x and 0x with 0 (or nothing)

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How do you create functions in CAS

Create with :=

Example f(x) := x

And you can see it in Algebra window

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Thanks.

In most cases it's fine, but some times you want the parts of the expression to come in a random order.

In this case you can use this script (which I got by mathmagic when ask another question):

Sum(Shuffle({Polynomial(a x²), Polynomial(b x), Polynomial(c)}))

In danish the Shuffle function is called Bland[liste].

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yep

but polynomial doesn't work with the file of your post with no-polynomial functions...

(sqrt(x), exp(ax),1/x)

For example, with the exp(ax) in your file, only CAS gives a nice display

(Simplify change the form > exp(-2x) becomes 1/exp((x))² and it is not what you want in your derivative exercise)