20/20 Function Domains
The tutor in your pocket.
$0.99
7.1for iPhone, iPad
Age Rating
20/20 Function Domains Screenshots
About 20/20 Function Domains
A power learning aid combines 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.
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.
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What's New in the Latest Version 7.1
Last updated on Apr 6, 2024
Old Versions
iOS 17 compatibility and minor bug fixes.
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Version History
7.1
Apr 6, 2024
iOS 17 compatibility and minor bug fixes.
7.0
Oct 10, 2021
Minor user interface bug fixes.
6.9
Oct 6, 2021
iOS 15 compatibility and minor bug fixes.
6.8
Sep 5, 2021
Minor bug fixes.
6.7
Jan 23, 2020
Minor bug fixes and enhancements.
6.6
Jan 15, 2020
Minor bug fixes and app streamlining. Secondary modules are moving to free apps for you to GET if you wish.
6.5
Oct 5, 2019
New transpose option for linear inequalities. Minor bug fixes.
6.4
Sep 25, 2019
iOS 13 and iPadOS compatibility.
6.3
Jan 19, 2019
Major revision with streamlined user interface. Minor bug fixes.
6.2
Sep 25, 2018
Universal iPhone and iPad app. iOS 12 compatibility.
6.1
Nov 1, 2017
iPhone X and iOS 11 optimization and minor bug fixes.
6.0
Sep 21, 2016
iOS 10 compatibility and bug fixes.
5.1
Oct 1, 2015
iOS 9 compatibility and bug fixes.
5.0
Apr 3, 2015
Improved Guides for iPhone 6 and iPhone 6 Plus and minor bug fixes.
4.0
Sep 27, 2013
iOS 7 version.
3.1
Apr 9, 2013
New modules for finding domains of simple radical functions. Domains are now in both set-builder and interval notation.
3.0
Apr 3, 2013
Major revision includes Coaching Calculator for rational functions such as f(x) = (6x + 3)/(6x² + 5x − 6) .
2.2
Sep 25, 2012
iOS 6 and iPhone 5 compatibility.
2.1
Dec 17, 2010
Minor bug fixes and layout changes.
2.0
Nov 24, 2010
New menu system and revised guide.
1.2
Aug 2, 2009
App requires OS 3. Minor enhancements.
1.1
Apr 28, 2009
Minor bug fix.
1.0
Apr 20, 2009
20/20 Function Domains FAQ
Click here to learn how to download 20/20 Function Domains in restricted country or region.
Check the following list to see the minimum requirements of 20/20 Function Domains.
iPhone
Requires iOS 16.0 or later.
iPad
Requires iPadOS 16.0 or later.
20/20 Function Domains supports English
