Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.2: Exponents And Radicals
Problem 27E
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Focusing Distance For a camera with a lens of fixed focal length F to focus on an object located a distance x from the lens, the film must be placed a distance y behind the lens, where F, x, and y are related by
refer image
(See the figure.) Suppose the camera has a 55-mm lens (F = 55).
(a) Express y as a function of x, and graph the function.
(b) What happens to the focusing distance y as the object moves far away from the lens?
(c) What happens to the focusing distance y as the object moves close to the lens?
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