science physics

# Can LN be negative?

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Natural Logarithm of Negative Number
The natural logarithm function ln(x) is definedonly for x>0. So the natural logarithm of a negativenumber is undefined. The complex logarithmic function Log(z) isdefined for negative numbers too.

Correspondingly, why can't you ln a negative number?

If you raise a negative number to apositive number that's not an integer, but instead afraction or a decimal, you might end up with a negativenumber underneath a square root. So in summary, because thebase can only be a positive number, that means the argumentof the logarithm can only be a positive number.

Additionally, what is the natural log of negative infinity? Natural logarithm rules and properties
Rule name Rule
ln of negative number ln(x) is undefined when x ≤ 0
ln of zero ln(0) is undefined
ln of one ln(1) = 0
ln of infinity lim ln(x) = ∞ ,when x→∞

Additionally, what does negative log mean?

Negative Logarithms A negative logarithm means how many times todivide by the number. We can have just one divide: Example: What islog8(0.125) ? Well, 1 ÷ 8 = 0.125, Solog8(0.125) = −1.

What is the value of ln 0?

The real natural logarithm function ln(x) isdefined only for x>0. So the natural logarithm of zero isundefined.

Professional

## What is the log of 0?

log 0 is undefined. It's not a real number,because you can never get zero by raising anything to the power ofanything else. You can never reach zero, you can only approach itusing an infinitely large and negative power. 3.

Professional

## How do you find the antilog of a negative number?

How to take antilog of negative number
1. First convert the negative number in to two parts one negative( characteristic) and the decimal part( Mantissa) into positive.For example, lets take antilog of. -7.5231. by adding +8 andsubtracting -8 as follows : -7.5231 +8 - 8 = -8 + (8-7.5231) = -8+0.4769.
2. welcome.
3. okay thx.

Professional

## What is the function of log?

In mathematics, the logarithm is the inversefunction to exponentiation. That means the logarithm of agiven number x is the exponent to which another fixed number, thebase b, must be raised, to produce that number x.

Explainer

## What is ln and log?

Usually log(x) means the base 10 logarithm; itcan, also be written as log10(x) . ln(x) means thebase e logarithm; it can, also be written as loge(x) .ln(x) tells you what power you must raise e to obtain thenumber x.

Explainer

## Can a log have a negative solution?

Logarithms cannot have non-positive arguments(that is, arguments which are negative or zero), butquadratics and other equations can have negative solutions.Each log in the equation had the same base, and eachside of the log equation ended up with the value, so thesolution "checks".

Explainer

## Can the base of an exponential function be negative?

Because we only work with positive bases,bx is always positive. The values of f(x) , therefore,are either always positive or always negative, depending onthe sign of a . Exponential functions live entirely on oneside or the other of the x-axis. If 0 < b < 1 , thefunction decays as x increases.

Pundit

## Is 0 a real number?

Yes, 0 is a real number in math. Bydefinition, the real numbers consist of all of thenumbers that make up the real number line. Thenumber 0 is at the center of the number line, so weknow that 0 is a real number. Furthermore, 0is a whole number, an integer, and a rationalnumber.

Pundit

## Can you take log 0?

Why log(0) is not defined. The reallogarithmic function logb(x) is defined only forx>0. So the base b logarithm of zero is notdefined.

Pundit

## What is negative log equal to?

log (1/a) = -log a means that thelogarithm of 1 divided by some number is equal to thenegative logarithm of that number. (This is the exactly theopposite of the rule governing exponents where a number raised to anegative number is equal to 1 divided by that numberraised to that power.)

Pundit

## What is log10 equal to?

Mathematically, log10(x) is equivalent tolog(10, x) . See Example 1. The logarithm to the base 10 isdefined for all complex arguments x ≠ 0. log10(x)rewrites logarithms to the base 10 in terms of the naturallogarithm: log10(x) = ln(x)/ln(10) .

Pundit

## What is the opposite of log?

Logarithms are the "opposite" of exponentials,just as subtraction is the opposite of addition and divisionis the opposite of multiplication. Logs "undo"exponentials. Technically speaking, logs are the inverses ofexponentials. On the left-hand side above is the exponentialstatement "y = bx".

Teacher

## Why is pH the negative log?

Due to the logarithmic nature of the pHscale, it is incorrect to simply average pH values andreport them. Instead, it is more appropriate to report the medianpH value or provide the range of pH values observed.Equation [1] represents the determination of pH from thenegative log base 10 of hydrogen ion activity.

Teacher

## What is log2?

log2(x) represents the logarithm of x to the base2. Mathematically, log2(x) is equivalent to log(2, x) . SeeExample 1. The logarithm to the base 2 is defined for all complexarguments x ≠ 0. log2(x) rewrites logarithms to the base2 in terms of the natural logarithm: log2(x) = ln(x)/ln(2).

#### Troy Cipriano

Teacher

How to Use the Log Function on a Calculator
1. Type the number you're working with into your graphing orscientific calculator. For example, type "1000."
2. Press the "Log" button on your calculator. The number youimmediately see is the exponent for the original number youentered.

Reviewer

## How do you find the pH of a log?

The formula for pH is pH =-log[H+]. This means pH is the negative base 10logarithm ("log" on a calculator) of the hydrogen ionconcentration of a solution. To calculate it, take the logof the hydrogen ion concentration and reverse the sign to get theanswer.

Reviewer

## Is Log negative number?

The natural logarithm function ln(x) is definedonly for x>0. So the natural logarithm of a negativenumber is undefined. The complex logarithmic functionLog(z) is defined for negative numberstoo.

#### Dahba Gold

Reviewer

The natural logarithm of a number is itslogarithm to the base of the mathematical constant e,where e is an irrational and transcendental number approximatelyequal to 2.718281828459. The natural logarithm of x isgenerally written as ln x, loge x, or sometimes,if the base e is implicit, simply log x.

Reviewer

## What is ln * e?

The natural logarithm of a number x is defined as thebase e logarithm of x: ln(x) =loge(x) So the natural logarithm of e isthe base e logarithm of e: ln(e) =loge(e) ln(e) is the numberwe should raise e to get e.

Supporter

## How do you convert LN to log?

To convert a number from a natural to acommon log, use the equation, ln(x) = log(x)÷ log(2.71828).

Co-Authored By:

#### EveryThingWhat Staff Editor

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29th January, 2020

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