How to deduce that the speed of an object cannot reach the speed of light from Lorentz transformation Can it be deduced from the basic principles of relativity?

How to deduce that the speed of an object cannot reach the speed of light from Lorentz transformation Can it be deduced from the basic principles of relativity?

first
In various relativistic formulas, there is often a factor "1 - (V / C) ^ 2" under the root sign ". If the speed of the object v exceeds the speed of light C, the result of the operation will appear an imaginary number, which is incomprehensible
second
One of the conclusions of the theory of relativity is that the mass of an object increases with the speed of motion. When the speed is infinitely close to the speed of light, the mass tends to infinity. From a = f / m, the closer to the speed of light, the more difficult it is to accelerate the object

Why did Einstein say that no matter can travel faster than the speed of light?

1. Because according to Einstein's formula: M = m / root sign 1-V ^ 2 / C ^ 2, where m is the moving mass of the object and M is the static mass. If the velocity V of the object is close to the speed of light, then the denominator of that formula tends to zero, then the moving mass tends to infinity, then the object will use infinite energy to convert the mass to the speed of light, and then deduce that

On Einstein's formula for proving that the speed of light cannot be surpassed
List it to me and tell me what each letter means

E = MC square, e is energy, M is mass, C is the speed of light. When the speed of an object increases, the kinetic energy will increase, e will increase, so m will increase, so when the speed is infinitely close to the speed of light, the mass of the object will increase to infinity