Contemporary Abstract Algebra
Contemporary Abstract Algebra
9th Edition
ISBN: 9781305657960
Author: Joseph Gallian
Publisher: Cengage Learning
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Chapter 18, Problem 26E

In Z [ 2 ] = { a + b 2 | a , b Z } , show that every element of the form ( 3 + 2 2 ) n is a unit, where n is a positive integer.

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1. a scientist observed a bacterium in a microscope. it measured about .0000029 meter in diameter which of the following is closest to it? A- 2 x 10^-6, B- 2 x 10^-5, C- 3 x 10^-5, or D- 3 x 10^-6 2.express the product of 500 and 400 in scientific notation. is it 2 x 10^5 or 2 x 10^4 or 2 x 10^3 or 20 x 10^4
Please Help me answer this linear algebra question. This is a practice textbook question.

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