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J u m l ah d ere t t ak hin gg a d a r i 1 + 2 1 ​ + 4 1 ​ + 8 1 ​ + ... a d a l ah ...

  1. 2

  2. 31 over 16

  3. 30 over 16

  4. 31 over 32

  5. 30 over 32

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A. Acfreelance

Master Teacher

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R u m u s space d e r e t space G e o m e t r i space t a k space h i n g g a  S subscript infinity equals fraction numerator a over denominator 1 minus r end fraction comma vertical line r vertical line less than 1    A k a n space d i c a r i space n i l a i space a space d a n space r space  left parenthesis a right parenthesis space N i l a i space a space d a p a t space d e n g a n space m u d a h space d i k e t a h u i space y a i t u space s u k u space p e r t a m a comma space j a d i space a equals 1  left parenthesis b right parenthesis space N i l a i space r space d a p a t space d i h i t u n g space d a r i space r a s i o space s u k u space k e space 2 space d e n g a n space s u k u space p e r t a m a comma space j a d i space r space equals fraction numerator 1 half over denominator 2 end fraction equals 1 half    S subscript infinity equals fraction numerator 1 over denominator 1 minus begin display style 1 half end style end fraction  S subscript infinity equals fraction numerator 1 over denominator begin display style 1 half end style end fraction  S subscript infinity equals 2

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