1. I don't understand how to prove this.(adsbygoogle = window.adsbygoogle || []).push({});

for all n≥1, 10^{n}- 1 is divisible by 9.

3. I've done the basis step.

Now i'm on the inductive step.

I'm using (10^{k+1}-1)/9=1.

I don't know where to go from there.

Using algebra just gets me down to 10^{k+1}= 10. And I really don't think that's the answer.

All examples i've seen show me things like 1...2..3..n+1= n(n+1) or something along the lines. They already give me the equation. This one does not.

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# Homework Help: Mathematical Induction (The inductive step)

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