Es n511
Es n511
(√(x - 5) - √(x - 5)/(1 - √(x - 5)) - (x - 5)/(1 + √(x - 5)))/(x - 5)
pongo:
√(x - 5) = t----> x - 5 = t^2
quindi:
(t - t/(1 - t) - t^2/(1 + t))/t^2
(t·(1 - t^2) - t·(1 + t) - t^2·(1 - t))/(1 - t^2)/t^2
((t - t^3) - (t^2 + t) - (t^2 - t^3))/(1 - t^2)/t^2
(- 2·t^2)/(1 - t^2)/t^2
2/(t^2 - 1)
t^2 = x - 5
quindi:
2/(x - 5 - 1) =2/(x - 6)