Question

what are the numbers represent x for which are lxl=l​

Answer 1

Answer:

Mathematical Expression for |x| goes like,

|x| = x , x>=0 and

|x| = -x, x<0

Let me explain this,

The ultimate aim of taking modulus of a variable is to find the absolute value or magnitude of the variable or vector and ignore the sign or direction (in case of vectors).

So, if x is positive, we are done .Just return x

Else,

If x is negative, to return the magnitude…..we got to return the negative(-1) of the variable x (which itself is negative) as multiplying a negative number by -1 makes it positive, So thats why we are returning -x.

Answer 2

|| Two straight lines denotes the mod which is a type of function which means it will always gives us a positive value (output) even on Nagative input”

Let us understand by an example—

|2|=2|2|=2

It gives positive value but here 22 is already positive so there is no means of mod.

|−2|=2|−2|=2

Here, as we know mod gives positive value.

But inside mod there is Nagative here it work and make −2−2 a positive and our output is positive.

Here, we concluded that A mod gives a positive quantity on Nagative input and at positive input it's work is not considerable.

Now your question “|x|”“|x|” means

When we put x a positive number it remains as it is i.e

|x|=x|x|=x

But when we put Nagative value it makes it positive i.e

|−x|=x|−x|=x

Simply A mod function always gives a positive value.

$\mathcal{BE \: BRAINLY}$