if r<1 and positive and m is a positive integer show that (2m+1)r(to the power m)(1-r)<1-r(to the power 2m-1......)(r has been raised to respsctive powers..)
if r<1 and positive and m is a positive integer show that (2m+1)r(to the power m)(1-r)<1-r(to the power 2m-1......)(r has been raised to respsctive powers..)