Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter7: Real And Complex Numbers
Section7.2: Complex Numbers And Quaternions
Problem 44E
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Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
Question
Prove the equation is true if the absolute value of r is less than 1.
Expert Solution
Step 1
To prove the below equation
Step 2
Rewriting the summation
Case 1: when r = 1
Step 3
Case 2: When r = -1
It gives an alternating series of constant value, which is not decreasing therefore the series diverges.
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