Anish Singhal
Last Activity: 6 Years ago
Well, the logarithmic integral is given by -
∫1log(x)dx=li(x)∫1log(x)dx=li(x)
which is a special function known as the integral logarithm.
It can also be represented as -
∫1log(x)dx=∫1log(x)dx=
Lett=log(x)which can also be written ase^t=x
Therefore on differentiatingt=log(x)on both sides we get,
dt=xdx
or,dx=xdt→dx=etdt
∫1log(x)dx=∫e^t/tdt
which givesEi(t)+c
i.eEi(log(x))+c
HereEi is an exponential integral.