$\"\"$

The mass of the particle moving with velocity $\"\"$ is $\"\"$ .

Where $\"\"$ is the mass of the particle at rest and $\"\"$ is the speed of light.

Find $\"\"$ .

As $\"\"$ tends to $\"\"$ from left side, then the fraction $\"\"$ becomes approximately

equal to $\"\"$ .

So denominator of the function becomes approximately equal to zero.

Therefore $\"\"$ .

$\"\"$

$\"\"$ .