af af and dx ду a²ƒ a² f 9 and hence show that there is a a² f dx dy' მr2’მყ2 uate each of the first and second partial derivat or polynomial of degree 2 for f centred at (1, 1) and and hence determine

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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Could you please  do all parts and provide written solutions , with explanations 

7. Let the function ƒ be defined by f(x, y) = x²y³ – exy.
af af
(a) Find
and
and hence show that there is a stationary point at (x, y) = (0, 0).
əx ду
a²ƒ
a²f
0² f
(b) Find
дх2 дуг dady
(c) Evaluate each of the first and second partial derivatives of f at (x, y) = (1, 1). Hence determine the
Taylor polynomial of degree 2 for f centred at (1,1).
"
and
"
and hence determine the nature of the stationary point at (0,0).
Transcribed Image Text:7. Let the function ƒ be defined by f(x, y) = x²y³ – exy. af af (a) Find and and hence show that there is a stationary point at (x, y) = (0, 0). əx ду a²ƒ a²f 0² f (b) Find дх2 дуг dady (c) Evaluate each of the first and second partial derivatives of f at (x, y) = (1, 1). Hence determine the Taylor polynomial of degree 2 for f centred at (1,1). " and " and hence determine the nature of the stationary point at (0,0).
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