Question

5(√x-1 )/(x-1)

Сколько будет?

Answer 1

5*(√x - 1) / (x5*(√x - 1) / (x - 1) =  - 1) = 5*(√x - 1) / [(√x) - 1) *(√x + 1)] =
 = 5/(√x + 1)