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If ƒ (x, y) = log (x² + y²), then f +f, is equal to XX yy 1 (a) x² + y² (b) 0 2 1,² - x² (c) (d) (x² + y²)² x² - y² (x² + y²) ²

If ƒ (x, y) = log (x² + y²), then f +f, is equal to XX yy 1 (a) x² + y² (b) 0 2 1,² - x² (c) (d) (x² + y²)² x² - y² (x² + y²) ²

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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2. Iff(x, y) = log (x² + y²), then fu + f is equal to 1 (a) + y² (b) 0 2-² 2-x² (d) (x+y=² (x2+y2² (c) x
Transcribed Image Text:2. Iff(x, y) = log (x² + y²), then fu + f is equal to 1 (a) + y² (b) 0 2-² 2-x² (d) (x+y=² (x2+y2² (c) x
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