Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter P - Section P.6 - Rational Expressions - Exercise Set - Page 86: 98

Answer

See explanations.

Work Step by Step

It is essential that the denominator can not be zero which leads to the exclusion of certain $x$ values from the domain. In addition, when dividing a rational expression, both its numerator and denominator can not be zero as we need to invert the expression and multiply.
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