Let a and b be positive numbers with a>b. Let a1 be their arithmetic mean and b1 their geometric mean. a1 = a+b/2      b1 = √ab Repeat this process so that, in general, an+1= an+bn/2     bn+1= √ab (a) Use mathematical induction to show that an>an+a>bn+1>bn (b) Deduce that both {an} and {bn} are convergent. (c) show that limn-->infinity an = limn-->infinity bn. Guass call the commone value of thes limits the arithmetic-geometric mean of the numvers a and b.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.1: Real Numbers
Problem 40E
icon
Related questions
Question

Let a and b be positive numbers with a>b. Let a1 be their arithmetic mean and b1 their geometric mean.

a1 = a+b/2      b1 = √ab

Repeat this process so that, in general,

an+1= an+bn/2     bn+1= √ab

(a) Use mathematical induction to show that

an>an+a>bn+1>bn

(b) Deduce that both {an} and {bn} are convergent.

(c) show that limn-->infinity an = limn-->infinity bn. Guass call the commone value of thes limits the arithmetic-geometric mean of the numvers a and b.

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 6 images

Blurred answer
Recommended textbooks for you
Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
Algebra
ISBN:
9781133382119
Author:
Swokowski
Publisher:
Cengage