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geerky42
 3 years ago
\[\Large \int \dfrac{dx}{\ln x}\]
geerky42
 3 years ago
\[\Large \int \dfrac{dx}{\ln x}\]

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inkyvoyd
 3 years ago
Best ResponseYou've already chosen the best response.1set u=ln x then du/dx/u

inkyvoyd
 3 years ago
Best ResponseYou've already chosen the best response.1you should be able to figure it out with usub

geerky42
 3 years ago
Best ResponseYou've already chosen the best response.1but then how can I use du? There is no place to put du

inkyvoyd
 3 years ago
Best ResponseYou've already chosen the best response.1I may have overlooked this >.< gimme a minute getting some paper

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Integration by parts?

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0It can't be expressed in terms of other functions. That integral is the basis of the logarithmic integral function \[li(x)=\int_{0}^{x}\frac{dt}{ln(t)}\]

inkyvoyd
 3 years ago
Best ResponseYou've already chosen the best response.1u=lnx du=dx/u Int 1/u dx=int du

geerky42
 3 years ago
Best ResponseYou've already chosen the best response.1Please explain more clear @inkyvoyd How to use usubstitution?

inkyvoyd
 3 years ago
Best ResponseYou've already chosen the best response.1gimme a minute lemme use latex

geerky42
 3 years ago
Best ResponseYou've already chosen the best response.1well then i get u = u it dont do anything.

geerky42
 3 years ago
Best ResponseYou've already chosen the best response.1I think @Xavier is correct, it can't be expressed

inkyvoyd
 3 years ago
Best ResponseYou've already chosen the best response.1yes, xavier is in fact correct (facepalm)
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