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shubhamsrg
Let a_n = 1.............1 with 3^n digits. Prove that a_n is divisible by 3a_(n-1).
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a_n = 1...11...11..1 (divided them into three parts) a_(n-1)= 1...1 a_n/a_(n-1)=10...010...01 Example n=2 a_n=111 111 111 a_(n-1)=111 a_n/a_(n-1) = 1 001 001 n=3 a_n= 111111111 111111111 111111111 a_(n-1) = 111111111 a_n/a_(n-1) = 1 000000001 000000001
hmms,,seems satisfactory,,thanks! :)
can we use induction here? just to generalize things more?
bah,,let it be,,thanks again..