Computing a 3x3 determinant and Wronskian of 3 functions

Differential Equations--how do we find a 3x3 determinant (formula) and a sample Wronskian of 3 functions. Recall if 3 functions have a nonzero Wronskian on some interval, they are linearly independent on that interval

[kelloginc]

oh my goodness, thank you so much! We desperately need more teachers like you! <3

[rosendonegreros]

Thank you for explaining this step by step !

[englishforfunandcompetitio]

Especially solutions of differential equations via power series technique.

[bonuspoints]

Thank you very much it was quite easy to understand, one question: is there any restriction to where the colum to expand can be placed? for example using a11 a21 and a31 or in the other example use the colum 1 0 0 to make the process much faster

[englishforfunandcompetitio]

Videos on power series are requested....