17Calculus - Precalculus




Basics of Functions

Specific Functions

Rational Functions





Complex Numbers


Learning Tools


NEW for 2020 - We have recently expanded the precalculus section with hundreds more practice problems and several new pages as well as expanded discussion on many more pages.

There are lots and lots of online videos and websites to help you review and learn precalculus and college algebra. And you could waste a lot of time trying to find help.

So, how can you prepare for calculus and not waste time?

Use 17Calculus Precalculus

We have sorted through lots of videos and websites for you and organized everything you need. We build discussion around videos and provide lots of practice problems, ALL with worked out solutions (not just answers but complete, worked out in detail and explained solutions).

So, who is this site for? We built this site for the serious college student in math, engineering, science and/or business . . . pretty much any college student serious about learning precalculus, college algebra, algebra 2, analytic geometry or trigonometry. We also assume that you will be going on to calculus but this is not a requirement to learning from this site.

To get the most out of this site, you need a solid background in basic algebra and basic geometry. You also need some exposure to trigonometry, although we cover some of the basics.

So how much will this cost you? Nothing! All the material is free.

Ready to really UNDERSTAND precalculus? Okay, let's go.

To get started, select a topic from the menu.

Precalculus Books Recommendations

Here are a few books that we recommend from which to learn precalculus. For a complete list of books and to read about how to get the most out of your textbooks and supplementary books, go to our college books page.

Schaums Outline of Precalculus

Really UNDERSTAND Precalculus

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Search Practice Problems

Do you have a practice problem number but do not know on which page it is found? If so, enter the number below and click 'page' to go to the page on which it is found or click 'practice' to be taken to the practice problem.

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The 17Calculus and 17Precalculus iOS and Android apps are no longer available for download. If you are still using a previously downloaded app, your app will be available until the end of 2020, after which the information may no longer be available. However, do not despair. All the information (and more) is now available on 17calculus.com for free.

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When using the material on this site, check with your instructor to see what they require. Their requirements come first, so make sure your notation and work follow their specifications.

DISCLAIMER - 17Calculus owners and contributors are not responsible for how the material, videos, practice problems, exams, links or anything on this site are used or how they affect the grades or projects of any individual or organization. We have worked, to the best of our ability, to ensure accurate and correct information on each page and solutions to practice problems and exams. However, we do not guarantee 100% accuracy. It is each individual's responsibility to verify correctness and to determine what different instructors and organizations expect. How each person chooses to use the material on this site is up to that person as well as the responsibility for how it impacts grades, projects and understanding of calculus, math or any other subject. In short, use this site wisely by questioning and verifying everything. If you see something that is incorrect, contact us right away so that we can correct it.

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