Answer:
Answer is option b
Step-by-step explanation:
[tex]answer \: is \: option \: b \\ a \: n \: = 12 \times (\frac{1}{2}) {}^{n - 1} \\ when \: we \: subtitute \: n = 1 \: we \: get \: 12 \: as \: answer \\ when \: we \: substitute \: n \: = 2 \: we \: get \:t he \: answer \: 6[/tex]
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