To approximate the reciprocal of a number a without using division, we can apply Newtons method to

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To approximate the reciprocal of a number a without using division, we can apply Newton’s method to the function f(x) = 1/x - a.

a. Verify that Newton’s method gives the formula xn + 1 = (2 - axn)xn.

b. Apply Newton’s method with a = 7 using a starting value of your choice. Compute an approximation with eight digits of accuracy. What number does Newton’s method approximate in this case?

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Calculus Early Transcendentals

ISBN: 978-0321947345

2nd edition

Authors: William L. Briggs, Lyle Cochran, Bernard Gillett

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