Repeated square roots Consider the sequence defined byan + 1 = √(2 + an) , a0 = √2, for n = 0, 1, 2, 3, ⋅ ⋅ ⋅.a. Evaluate the first four terms of the sequence {an}. State theexact values first, and then the approximate values.b. Show that the sequence is increasing and bounded.c. Assuming the limit exists, determine the limit exactly.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.1: Infinite Sequences And Summation Notation
Problem 76E
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Repeated square roots Consider the sequence defined by
an + 1 = √(2 + an) , a0 = √2, for n = 0, 1, 2, 3, ⋅ ⋅ ⋅.
a. Evaluate the first four terms of the sequence {an}. State the
exact values first, and then the approximate values.
b. Show that the sequence is increasing and bounded.
c. Assuming the limit exists, determine the limit exactly.

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