Q. Find the 13th term of the geometric sequence 8,16,32,…Answer:
Identify first term: To find the 13th term of a geometric sequence, we need to use the formula for the nth term of a geometric sequence, which is an=a1⋅r(n−1), where a1 is the first term, r is the common ratio, and n is the term number we want to find.
Find common ratio: First, we identify the first term a1 of the sequence, which is 8.
Calculate 13th term: Next, we need to find the common ratio r. We can do this by dividing the second term by the first term: r=816=2.
Calculate exponent: Now that we have the first term and the common ratio, we can find the 13th term (a13) using the formula: a13=8×2(13−1).
Calculate 212: We calculate the exponent: 213−1=212.
Multiply first term: Next, we calculate 212, which is 4096.
Multiply first term: Next, we calculate 212, which is 4096.Finally, we multiply the first term by 4096 to find the 13th term: a13=8×4096=32768.
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