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Find an explicit formula for the geometric sequence 
12,24,48,96,dots..
Note: the first term should be 
b(1).

b(n)=

Find an explicit formula for the geometric sequence \newline12,24,48,96,12, 24, 48, 96, \dots.\newlineNote: the first term should be \newlineb(1)b(1).\newlineb(n)=b(n) =

Full solution

Q. Find an explicit formula for the geometric sequence \newline12,24,48,96,12, 24, 48, 96, \dots.\newlineNote: the first term should be \newlineb(1)b(1).\newlineb(n)=b(n) =
  1. Identify Sequence Type: Identify the type of sequence.\newlineThe sequence 12,24,48,96,extellipsis12, 24, 48, 96, extellipsis is a geometric sequence because each term is obtained by multiplying the previous term by a constant ratio.
  2. Determine First Term and Common Ratio: Determine the first term (b1b_1) and the common ratio (rr) of the sequence.\newlineThe first term is b1=12b_1 = 12.\newlineTo find the common ratio, divide the second term by the first term: r=2412=2r = \frac{24}{12} = 2.
  3. Write Explicit Formula for nth Term: Write the explicit formula for the nth term of the geometric sequence.\newlineThe formula for the nth term of a geometric sequence is b(n)=b(1)r(n1)b(n) = b(1) \cdot r^{(n - 1)}.\newlineSubstitute b(1)=12b(1) = 12 and r=2r = 2 into the formula.\newlineb(n)=122(n1)b(n) = 12 \cdot 2^{(n - 1)}.

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