Question: Show that if r 1, then for every positive integer n. 1+r++. .. + ph .. 1 - pn+1 1-r

Show that if r ≠ 1, then1+r++. .. + ph .. 1 - pn+1 1-r


for every positive integer n.

1+r++. .. + ph .. 1 - pn+1 1-r

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