- #1
chicago77
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So this is a theoretical question I am not sure about with partial derivatives.
Say we have function x(i,j) with a=dx/di and b=dx/dj
Now is this logical when the cross derivatives are required to be equal?
db/da --> substitute b
= d^2x/(dadj) substitute da
= d^2x/((d^2x/di)dj)
=di/dj
Is this allowed?
Say we have function x(i,j) with a=dx/di and b=dx/dj
Now is this logical when the cross derivatives are required to be equal?
db/da --> substitute b
= d^2x/(dadj) substitute da
= d^2x/((d^2x/di)dj)
=di/dj
Is this allowed?