Respuesta :

Answer:

Step-by-step explanation:

3 9 27 81    3^5 = 2433^6 = 243*3 = 729 So the units digiit appears to cycle  in this roup of 4:      3   9   7   1       3  9  7  1   2086/4 = 2086/4 = 521  R 2          so units digit will be   9