21. Use vectors to prove that(a² + b³)(c² + dď²) = (ac + bd)²for any four numbers a, b, c, and d. (Hint: Let u = ai + bj andv = ci + dj.)

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Answered: 21. Use vectors to prove that (a² +…

Calculus: Early Transcendentals

8th Edition

ISBN:9781285741550

Author:James Stewart

Publisher:James Stewart

Chapter1: Functions And Models

Section: Chapter Questions

Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...

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21. Use vectors to prove that (a² + b³)(c² + dď²) = (ac + bd)² for any four numbers a, b, c, and d. (Hint: Let u = ai + bj and v = ci + dj.)