Pure Mathematics 1 by Backhouse is a valuable textbook for students taking A-level mathematics in the UK. The book provides a comprehensive introduction to pure mathematics, covering essential topics and concepts. While downloading a PDF version of the book may be convenient, be sure to exercise caution and respect copyright laws.

Pure Mathematics 1 is a textbook written by N. Backhouse, J. D. May, and C. K. Macey, first published in 1982. The book is part of a series of textbooks on pure mathematics, designed for students taking A-level mathematics in the UK. The book covers various topics in pure mathematics, including algebra, geometry, and trigonometry.

If you're looking for a downloadable PDF version, you can try searching online repositories, educational websites, or the publisher's website. Alternatively, you can consider purchasing a physical copy of the book or accessing it through a library or educational institution.