### What's New

Minor bug fixes and enhancements.

### App Description

A power learning aid combining Coaching Calculators and Guides to help students find the domains of simple rational functions and radical functions.

The Coaching Calculator covers rational functions such as :

f(x) = (3x + 6)/9
f(x) = (x² - 4)/(3x + 6)
f(x) = (x² - 9)/(2x² + 4x - 6)

and radical functions such as :

f(x) = √(2x + 6)
f(x) = √((x² - 5x + 6)

Domains are given in set-builder and interval notation.

The Guide also looks at radical functions such as :

f(x) = -2/√(x - 3)
f(x) = (2x + 3)/(x - √(x + 2))

It's ideal for students as the menu design reinforces each problem solving step.

Examples highlight and simplify algebra that students find hard.

### iPhone Screenshots

(click to enlarge)

(click to enlarge)

### App Changes

• June 25, 2011 New version 2.1
• September 26, 2012 New version 2.2
• April 04, 2013 New version 3.0
• April 10, 2013 New version 3.1
• September 27, 2013 New version 4.0
• April 14, 2015 New version 5.0
• October 06, 2015 New version 5.1
• November 09, 2016 New version 6.0
• June 14, 2019 New version 6.3
• September 26, 2019 New version 6.4
• October 06, 2019 New version 6.5
• January 14, 2020 Price decrease: \$0.99 -> FREE!
• January 22, 2020 New version 6.6
• January 28, 2020 New version 6.7
• January 28, 2020 Price increase: FREE! -> \$0.99