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partial derivatives

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    Find the indicated partial derivative. u = e3rx sin x
    3u/∂r2∂x=
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    (Original post by Rose86)
    Find the indicated partial derivative. u = e3rx sin x=
    3u/∂r2∂x=
    What seems to be the issue?
    Whilst the computation is probably a little messy there are no real curve balls. . .
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    (Original post by joostan)
    What seems to be the issue?
    Whilst the computation is probably a little messy there are no real curve balls. . .
    sorry???
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    (Original post by Rose86)
    sorry???
    Have you made a start on this? What have you got so far?
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    Differentiate twice with respect to r and then once with respect to x. It's the same process, three times.
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    (Original post by mik1a)
    Differentiate twice with respect to r and then once with respect to x. It's the same process, three times.
    Yes, I know. I know that. I did it but the answear is incorret😕
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    (Original post by Rose86)
    Yes, I know. I know that. I did it but the answear is incorret😕
    Sorry, I left my mind reader in the office.
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    (Original post by Rose86)
    Yes, I know. I know that. I did it but the answear is incorret😕
    If you post your working out we can look and see maybe where the error is.
 
 
 
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