## The support I get from TI89.com has been phenomenal !!!!

I initially found TI89.com through the education.ti.com website because I was looking for an app which could help me understand Calculus equation better.

I initially bought the Calculus made easy 2 years ago and was just very fascinated how much this app helped me understand calculus problems better. If it wouldn’t have been for Calculus Made Easy I probably would have never passed Calculus I and II. Everything was very detailed and laid out in steps which makes it easy to follow.

Now several years later I own 5 of the TI89 apps apps made easy and I couldn’t be happier.

Statistics & Probability has been one of the hardest classes so far for me and I wished I would have bought the app sooner because it definitely helps seeing the equations before solving it.

The support I get from TI89.com has been phenomenal and I am never left in the dark with help in regards to questions.

Thanks so much for the support and developing this app because if it wouldn’t have been for TI89.com I probably would have struggled through most of my math studies.

## Laplace Transform Information using TI89’s Differential Equations Made Easy

1. To find the Laplace Transform of a piecewise defined function , select Laplace Transform in the Main Menu, next select option3 “Piecewise defined function” in the dropdown menu as shown below:

Next, enter the two pieces/functions as shown below.
c is the breakpoint.

2) To SOLVE a Differential Equation using LaPlace Tranforms such as

y”+2y’+y=0 with Initial Conditions y(0)=1 and y'(0)=1

Select “Solve Diff Eqns using LaPlace Transforms” in the Main menu and enter as follows:

Steps are shown until final answer is derived.

## Not only are these apps a life saver but when I had a question regarding downloading the apps, the costumer service was even more impressive – I just got a 100 on my linear algebra test using this app!

They are incredibly user friendly and helped me a ton, I just got a 100 on my linear algebra test using this app!
Not only are these apps a life saver but when I had a question regarding downloading the apps, the costumer  service  was even more impressive.
I have tried other apps before and had multiple complications with getting the apps to work and when I emailed no one was there to answer or care.
There is no other website or apps  that can even come close to ti89.com and tinspireapps.com,  they are truly unique.
Thank you ti89.com : you’re amazing
JLK

## Balancing a chemical equation using the TInspire CAS CX and the Chemistry Made Easy app – step by step

Here is a solved example:

When balancing the chemical equation: Fe2S3+O2=Fe2O3+SO2

The setup is a_*Fe2S3+b_*O2=c_*Fe2O3+d_*SO2

or : a_*(2Fe+3S)+b_*(2O)=c_*(2Fe+3O)+d_*(1S+2O)

This sets up : 2*a_=2*c_ and 3*a_=d_ and 2*b_=3*c_+2*d_

which has the solution : {a_,b_,c_,d_}={2,9,2,6}

Thus, 2*Fe2S3+9*O2=2*Fe2O3+6*SO2

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## The customer service at CME is fantastic and The Riemann sum section is especially good.

The customer service at TI89.com is fantastic, they replied in a very timely manner. This kind of service is rare.

I am using the Calculus Made Easy app

I use the app a great deal in checking work and to perform investigations.

The Riemann sum section is especially good.

## Love the TI89 Physics & Differential Equations Made Easy Apps PLUS: Outstanding Customer Service

I originally found the ti89.com website by surfing the web trying to find ways to help with my physics class.

Helped in so many ways especially when they do step by step.

I downloaded my second app a year later taking my differential equation class. It easily helped me understand the class and the equations being used.

What is even more outstanding is the customer service.

Quick response and help whenever needed.

Highly recommend these apps at ti89.com to anyone needing a little help with classes and a efficient tool to succeed!

## Chemistry App for the TiNspire CX CAS at www.TiNSpireApps.com has been updated : Bases, Acids, Equilibrium, Dissociation Constant, Valence Electrons

It seems that the Stoichiometry section of our Step by Step Chemistry App has doubled over the last few months, lots of new computational Chemistry has been added. Find app updates below:

– Valence Electrons of Atoms and Molecules
– Equilibrium Constant Kc
– Equilibrium Composition
– Kp = Kc*(RT)^n
– Equilibrium of weak bases
– Equilibrium of weak acids
-%-Dissociation and Dissociation Constant K ,
– Find pOH and PH of Bases.
– Improved Gas Laws
– Improved Step by Step Equation Balancer
– Mole <-> Mass Converters
– Rydberg Formulas

## Calculus Made Easy App for the TiNspire CX CAS at www.TiNSpireApps.com has been updated : Newton law of Cooling, Parametric Eqns, Root Test , etc

We love Calculus and enjoyed implementing the following updates:

– Differential Equations: Eulers Method, Newton Law of Cooling, Radioactive decay -Parametric Equations : given Velocity v(t) find Tangentline, Curve Length, etc – Convergence Test: The Root Test was added
– Further improvements to Step by Step L’hopital Rule, Limits and Step by Step Integration were made

## The most prestigious apps + first rate customer support = absolute primo @ Smartsoft/ tinspireapps/ ti89apps/

Has anyone ever told you how awesome you are?

This is really cool!!

thank you…

The most prestigious apps + first rate customer support = absolute primo
@ Smartsoft/ tinspireapps/ ti89apps/
That’s not calculus but it’s an equation that can be proved!!!!

## Calculus Made Easy app is phenomenal

Thanks for the great products and superb service you deliver.

Your CME app is phenomenal and am actually looking forward to writing exams now 🙂

Thanks for making it possible on the TI89!!!

Keep up the good work

## TI89 Made Easy Apps helped me to learn the material faster and perform better on tests

“The TI89 Made Easy apps helped me with test concepts in a way that provided me to learn the material faster.

This helped me to perform well on exams.”

Review of Long Time Made Easy Customer (Used 10 apps)