Is the Integral of 1/(x^2*lnx) Solvable Using Elementary Functions?

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∫dx/(x^2*lnx)

What I`ve seen on the web but I don`t think is right:
u= lnx *** what we have here isn't lnx but (lnx)^-1... This is why I doubt that's the right solution
du = dx/x
dv = dx/x^2
v = -1/x

=-lnx/x + ∫dx/x^2
=-lnx/x - 1/x + C

Let me know if it is correct, thanks!
 
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I didn't check if it is correct myself, but you never really need someone to check if an integral (like this) is correct. Just differentiate it.
 
JustaNickname said:
∫dx/(x^2*lnx)

What I`ve seen on the web but I don`t think is right:
u= lnx *** what we have here isn't lnx but (lnx)^-1... This is why I doubt that's the right solution
du = dx/x
dv = dx/x^2
v = -1/x

=-lnx/x + ∫dx/x^2
=-lnx/x - 1/x + C

Let me know if it is correct, thanks!

Maple 14 gets a non-elementary function for this integral; that is, it cannot be done in terms of elementary functions of the type you have used.

RGV
 

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