#### Answer

Never; $\frac{ab^{3}}{b^{4}}$$\ne$ab

#### Work Step by Step

This never works because if "b" is equal to 0, then the fraction will be undefined.

Published by
Prentice Hall

ISBN 10:
0133500403

ISBN 13:
978-0-13350-040-0

Never; $\frac{ab^{3}}{b^{4}}$$\ne$ab

This never works because if "b" is equal to 0, then the fraction will be undefined.

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