Derivative of log(x) by method of first principle

In this video learn how to find the derivative of a function by first principle with makes u comfortable and easier in approach.
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[dr.rahulgupta]

How lim log(1+h) / h is 1 ? This involves derivative of log function.How can you use this result ?

[Adarsh_PS]

Thanks sir, those additional informations helped me to clear my doubt a lot. The explanation was also good.

[dr.rahulgupta]

If x is negative then what happens ? Do we also have 1/ x then ?

[mohammadalamgir]

sir in case of Log(x) here base 10 then why we con, t take derivative of this like [d/dx(Logx)=1/

[mohammadalamgir]

d/dx(Logx)=1/xLog10^e .Because Log=Log10

[VISHNUKUMAR-lbbc]

Aapne jo log use kiya h, uska base e h??

[tuguldurbatoldokh]

it must only for Ln(x) work otherwise false

[aarushgoyal]

Thanks sir, those additional informations helped me to clear my doubt a lot. The explanation was also good.