For the following sequence determine the common difference (if it is an arithmetic sequence) or the common ratio (if it is a geometric sequence).12,83,16,…23333323
Q. For the following sequence determine the common difference (if it is an arithmetic sequence) or the common ratio (if it is a geometric sequence).12,83,16,…23333323
Check for Difference: To determine whether the sequence is arithmetic or geometric, we need to check if there is a constant difference (arithmetic sequence) or a constant ratio (geometric sequence) between consecutive terms.
Subtract First and Second Term: First, let's check for a common difference by subtracting the second term from the first term: 83−12.
Subtract Third and Second Term: Perform the subtraction: 83−12=8(1.732)−12≈13.856−12=1.856. This is not an integer, and we should check the next pair of terms to see if there is a consistent difference.
Check for Ratio: Now, subtract the third term from the second term: 16−83.
Divide Second by First Term: Perform the subtraction: 16−83=16−8(1.732)≈16−13.856=2.144. This difference is not the same as the previous one, indicating that the sequence is not arithmetic.
Divide Third by Second Term: Since the sequence is not arithmetic, let's check for a common ratio by dividing the second term by the first term: (83)/12.
Confirm Geometric Sequence: Perform the division: (83)/12=(128)3=(32)3. This simplifies to (23)/3.
Confirm Geometric Sequence: Perform the division: 1283=1283=323. This simplifies to 323.Now, divide the third term by the second term to check if the ratio is consistent: 8316.
Confirm Geometric Sequence: Perform the division: (83)/12=(8/12)3=(2/3)3. This simplifies to (23)/3.Now, divide the third term by the second term to check if the ratio is consistent: 16/(83).Perform the division: 16/(83)=(16/8)/3=2/3. To rationalize the denominator, multiply the numerator and denominator by 3 to get (23)/3.
Confirm Geometric Sequence: Perform the division: (83)/12=(8/12)3=(2/3)3. This simplifies to (23)/3.Now, divide the third term by the second term to check if the ratio is consistent: 16/(83).Perform the division: 16/(83)=(16/8)/3=2/3. To rationalize the denominator, multiply the numerator and denominator by 3 to get (23)/3.The ratio between the second and first term is (23)/3, and the ratio between the third and second term is also (23)/3. This indicates that the sequence is geometric with a common ratio of (23)/3.
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