# Method of Proof

**Computer Science**Level pending

Prove that \(1+r+r^{2}+...+r^{n-1}=\frac{r^{n}-1}{r-1}\), \(r\) a positive integer,\( r\neq 1\)!

If true, write 1 and if false write 0

Prove that \(1+r+r^{2}+...+r^{n-1}=\frac{r^{n}-1}{r-1}\), \(r\) a positive integer,\( r\neq 1\)!

If true, write 1 and if false write 0

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