Let a and b be positive real numbers. If a arithmetic progression a, G₁, G₂, b are in g ogression and a, H₁, H₂, b are in harmonic
Let a and b be positive real numbers. If a arithmetic progression a, G₁, G₂, b are in g ogression and a, H₁, H₂, b are in harmonic
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.2: Exponential Functions
Problem 71E
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Question
(a) Find the sum to infinity of the series
1-3x+5x\power{2}-7x\power{3}+....∞
where 0<|x|<1
(b)Let a and b be positive real numbers . If a , A\index{1},A\index{2},b are
in arithmetic progression a, G\index{1},G\index{2}, b are in geometric
progression and a, H\index{1},H\index{2}, b are in harmonic progression
then show that
\frac{G\index{1}G\index{2}|H\index{1}H\index{2}}=\frac{A\index{1}+A\index{2}|H\index{1}+H\index{2}}=\frac{(2a+b)(a+2b)|9ab}
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