Iff(x, y) = log (x² + y²), then f +f, is equal to yy 1 (a) x² + y² 2 (b) 0 2 1² - x² (c) (d) (x² + y²)² x² - y² (x² + y²) ²

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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2. If ƒ (x, y) = log (x² + y²), then ƒ +ƒ„‚ is equal to
XX
yy
1
(a) x² + y²
(b) 0
2
x² - y²
X
(c)
(d)
22
(x² + y²) ²
y²-x²
• (x² + y²)²
Transcribed Image Text:2. If ƒ (x, y) = log (x² + y²), then ƒ +ƒ„‚ is equal to XX yy 1 (a) x² + y² (b) 0 2 x² - y² X (c) (d) 22 (x² + y²) ² y²-x² • (x² + y²)²
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