Respuesta :

Lim [abs(x - 7)] / [x - 7] as x -> 7^-
For x = 6.9: Lim[abs(6.9 - 7) / (6.9 - 7)] = -1
For x = 6.99:
Lim[abs(6.99 - 7) / (6.99 - 7)] = -1
For x = 6.999:
Lim[abs(6.999 - 7) / (6.999 - 7)] = -1

Therefore,
Lim [abs(x - 7)] / [x - 7] as x -> 7^- is -1