Is Lnx always positive?

The outside function is ln x, and we know that to be in the domain of ln x, x must be a positive number.

Can you take log of a negative number?

You can’t take the logarithm of a negative number or of zero. 2. The logarithm of a positive number may be negative or zero.

How do you find the log of a negative number?

In particular, the logarithm of a negative real number x can then be calculated as log(x)=log(|x|eiπ)=log(|x|)+log(eiπ)=log(|x|)+iπ. for all k∈Z. Therefore, the complex logarithm is only defined up to multiples of 2πi !

Can I find the natural log of a negative number?

The natural logarithm function ln(x) is defined only for x>0. So the natural logarithm of a negative number is undefined. ln(x) is undefined for x ≤ 0 . The complex logarithmic function Log(z) is defined for negative numbers too. For z=r⋅e iθ, 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 . Natural logarithm of zero

How do you calculate negative log?

To take the log of a negative number, enter the negative number using the +/- key just to the right of the decimal point. To calculate the negative of a log, calculate the log and then negate it using +/-.

How do you compare positive and negative integers?

Tips to Remember for Ordering or Comparing Integers. Positive numbers are always greater than negative numbers. Negative numbers are always less than positive numbers. When using a number line, numbers increase as you move to the right. When using a number line, numbers decrease as you move to the left.

Is it possible for a logarithm to equal a negative number?

Yes, the logarithm of any positive number less than 1 is negative. Example on your TI-84, log(.9) = -.0457574906 However, logarithms can only be taken of positive numbers in the course you are taking.