Find the unit's digit of 8^n + 2^n if the unit digit of 4^n is not 6.
Answers
Answered by
0
Answer:
Correct option is
n = 67
n-1 4 67-1 4 = 66 = 16²/ 4
... remainder = 4
... Requiredlastdigit = unitdigitin(3³+¹) +
unitdigitof (2³+1)
= Unitdigitin27 + Unitdigitin8
= unitdigitin(7 + 8)
= unitdigitin(15) = 5 . thank u for watching
Similar questions