Pron a. If u = f(x, y), where r = e' cost, and y = e' sint, show that (3)³ + (3) ² - - ² [(-)* + (3)³] · = b. Let the function == f(x,y) be implicitly defined by: 2³ = 82² +²³-² Find əz dr at the point (1, 1, ?).

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Q: 3. From results obtained in Secs. 21 and 23, determine where f'(z) exists and find its value when…

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