Respuesta :

tonb

Answer:

k = -2

Step-by-step explanation:

If [tex]\frac12^{1-k}=\frac18[/tex]

Then

[tex]\frac1{2^{1-k}}=\frac18=\frac1{2^3}[/tex]

So

[tex]1-k = 3[/tex]

From this follows k = -2