Penjelasan dengan langkah-langkah:
Sn = a ( 1 - r^n ) / ( 1 - r )
S3 = 5 ( 1 - 2³ ) / ( 1 - 2)
S3 = 5 ( 1 - 8 ) / -1
S3 = 5 (-7) / - 1
S3 = -35 / -1
S3 = 35
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Penjelasan dengan langkah-langkah:
Sn = a ( 1 - r^n ) / ( 1 - r )
S3 = 5 ( 1 - 2³ ) / ( 1 - 2)
S3 = 5 ( 1 - 8 ) / -1
S3 = 5 (-7) / - 1
S3 = -35 / -1
S3 = 35