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3. Let z = f (x, y); х = e“ sin v & y = e“ cos v, show that — 2 2 2 да (%) да ди + (+) да ду e2u + (5) Ох ду
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3. Let z = f (x, y); х = e“ sin v & y = e“ cos v, show that — 2 2 2 да (%) да ди + (+) да ду e2u + (5) Ох ду
3. Let z = f (x, y); х = e“ sin v & y = e“ cos v, show that — 2 2 2 да (%) да ди + (+) да ду e2u + (5) Ох ду
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