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Second order partial derivative

I am trying to find z_{yy} but I am just not getting the answer on the solutions.

The last line is the solutions and the one before is my answer. I was so careful.

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Actual solution and q.

I have tried it two timea but still am not getting the same z_{yy}

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Reply 2
Original post by cooldudeman
Actual solution and q.

I have tried it two timea but still am not getting the same z_{yy}

Posted from TSR Mobile


see if this helps

pdes_general_introduction.pdf


Thanks. Its exactly the same question.

(It seems like everyone has different ways to find second order derivatives...)

Posted from TSR Mobile


On the second part of your solution, the 'tidy and reordering' part, the sign of the 4th term on the first line should be negative right?


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Reply 5
Original post by cooldudeman
On the second part of your solution, the 'tidy and reordering' part, the sign of the 4th term on the first line should be negative right?


Posted from TSR Mobile


possibly

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