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Rumus suku ke-n barisan bilangan 3, 6, 12, 24, ... adalah ...

  1. straight U subscript straight n space equals space end subscript 2 to the power of straight n minus 1 end exponent

  2. straight U subscript straight n space equals space end subscript 2.3 to the power of straight n minus 1 end exponent

  3. straight U subscript straight n space equals space end subscript 3.2 to the power of straight n minus 1 end exponent

  4. straight U subscript straight n space equals space end subscript 6 to the power of straight n minus 1 end exponent

A. C

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Pembahasan

3 comma space 6 comma space 12 comma space 24 comma space....  a equals 3  r equals U subscript 2 over U subscript 1 equals 6 over 3 equals 2  m a k a space r u m u s space U subscript n colon end subscript  U subscript n equals a cross times r to the power of n minus 1 end exponent  U subscript n equals 3 cross times 2 to the power of n minus 1 end exponent

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