Q. Find the common difference of the arithmetic sequence 12,9,6,…Answer:
Identify Pattern: Identify the pattern in the sequence to determine if it is arithmetic. The sequence shows a consistent decrease from one term to the next, which suggests it is an arithmetic sequence.
Calculate Common Difference: Calculate the common difference between consecutive terms.The difference between the first term 12 and the second term 9 is 12−9=3.Similarly, the difference between the second term 9 and the third term 6 is 9−6=3.
Verify Consistency: Verify that the common difference is consistent throughout the sequence.Since both differences calculated are the same 3, the common difference is consistent.