What is R^n?

This video defines R^n and gives examples of R^n.

[wensonchang]

so let me get this straight, R^2 just means the collection of ALL ordered pair of real numbers. Doesn't that just mean an infinite number of ordered pairs?

[goknil]

It was great explanining for someone who doesnt knwo this at all. Thx for the vid

[Vivek_]

What is the difference between R^n And R.
Like I read there is sequence in R^n and sequence in R and both of these are different?

[oygmsmc]

so this means in R^n, where n=>4 this is like 4 dimensions? im right now in a licenciature in physics and maths, and i cant understand when the problem be in R^4, i even google this but im still confuse

[YBJ]

Jee advanced uses this absurd notations to confuse aspirants