Question

Please explain why this is

Answer 1

\[\int\limits\limits_{n}^{\infty} \frac{ 1 }{ x^3 }dx = \lim_{t \rightarrow \infty} [\frac{ -1 }{ 2x^2 }] \]]from n \to t\

Answer 2

never mind

Answer 3

because it is the same as x^-2

Answer 4

cause it is the anti derivative right?

Answer 5

i mena ^-3