Q. Find the 12th term of the geometric sequence shown below.2x2,4x4,8x6,…Answer:
Identify Pattern: Identify the pattern in the sequence.The given sequence is 2x2, 4x4, 8x6, ...We can see that each term is obtained by multiplying the previous term by 2x2.
Determine Common Ratio: Determine the common ratio r of the sequence.Since each term is obtained by multiplying the previous term by 2x2, the common ratio r is 2x2.
Use Formula for nth Term: Use the formula for the nth term of a geometric sequence.The nth term an of a geometric sequence can be found using the formula an=a1⋅r(n−1), where a1 is the first term and r is the common ratio.
Substitute Values: Substitute the values into the formula to find the 12th term.The first term a1 is 2x2 and the common ratio r is 2x2. We want to find the 12th term, so n=12.a12=2x2⋅(2x2)12−1
Simplify Expression: Simplify the expression for the 12th term.a12=2x2×(2x2)11a12=2x2×211×x2×11a12=2x2×2048×x22a12=4096×x2+22a12=4096×x24
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