document.write( "Question 873298: use S(n)=a1 (1−rn ) / (1−r) to evaluate the series 1/3+1/9+1/27+1/81 \n" ); document.write( "

Algebra.Com's Answer #526761 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "r = 1/3
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document.write( " when |r| < 1, r^n is VERY small
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