e that ) a; = 28 %3D i=1 - 4g: + 9h:)

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 44E
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136
136
Suppose that aj = 28 and b; = 12. Compute the sum.
Σ
%3D
i=1
i=1
136
2(- 4a; + 9b;)
i=1
Transcribed Image Text:136 136 Suppose that aj = 28 and b; = 12. Compute the sum. Σ %3D i=1 i=1 136 2(- 4a; + 9b;) i=1
Expert Solution
Step 1

The given summation is :

i=1136ai=28  a1+a2+a3+a4.....................+a136=28. .........................1i=1136bi=12 b1+b2+b3+b4.....................+b136=12. .............................2

The sum of i=1136-4ai+9bi.

i=1136-4ai+9bi=-4i=1136ai+9i=1136bi

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