Question

ln(-x)=? ( For imaginary answer)
When 0≤x .

Answer 1

Answer:

ln(x) is undefined for x ≤ 0

The complex logarithmic function Log(z) is defined for negative numbers too.

For z=r⋅eiθ, the complex logarithmic function:

Log(z) = ln(r) + iθ , r >0

So for real negative number θ = -π:

Log(z) = ln(r) - iπ , r >0