3. Suppose that f is a differentiable function of one variable. If we define u(x, y) = x² f(y + In x), show that ди = ku ду Əx where k is a constant whose value you should determine. Hint: Let { = y + In x and consider u = x² f(£).

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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3. Suppose that f is a differentiable function of one variable. If we define
u(x, y) = x² f (y + In x),
show that
ди
du
ku
ду
where k is a constant whose value you should determine.
Hint: Let = y + In x and consider u =
x² f(£).
Transcribed Image Text:3. Suppose that f is a differentiable function of one variable. If we define u(x, y) = x² f (y + In x), show that ди du ku ду where k is a constant whose value you should determine. Hint: Let = y + In x and consider u = x² f(£).
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