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註釋When these authors found that conventional textbooks just weren't meshing well with the graphing technology they were using in their classes, they went to the drawing board. Precalculus: Concepts in Context takes a fresh look at the content of precalculus and offers students a different approach to learning mathematics. It begins with the real world of experience--music, commerce, psychology, natural science, daily news, etc.--and uncovers the mathematics already present. The study of each new topic begins by examining the concept in a context from which the topic naturally arises.