Question 156
Consider the arithmetic sequence $8, 21, 34, 47, \ldots$.
a) Prove that this sequence contains infinitely many integers written only with digit $9$.
b) How many such integers less than $2010^{2010}$ are in the sequence?
a) Prove that this sequence contains infinitely many integers written only with digit $9$.
b) How many such integers less than $2010^{2010}$ are in the sequence?