I bought the book attempted to study from it and I am not a fan. It covers topics too briefly to be called an "introduction" to mathematics. If you have a solid math background and need a refresher you may find it useful, otherwise I found MIT OCW Mathematics for Computer Science to be a much more suitable introduction, and it comes with problem sets and answers (for the 2010 course). You can also purchase the course notes in book form on Amazon.

https://ocw.mit.edu/courses/electrical-engineering-and-compu...

solutions https://drive.google.com/drive/folders/0B4G5KBKimr07WXRlT0VK...

physical book https://www.amazon.com/Mathematics-Computer-Science-Eric-Leh...