Q. Find the 73 rd term of the arithmetic sequence −28,−34,−40,…Answer:
Identify pattern: Identify the pattern of the sequence to determine if it is arithmetic.The sequence is decreasing by 6 each time, which means it is an arithmetic sequence with a common difference (d) of −6.
Find first term: Find the first term a1 of the sequence.The first term of the sequence is given as −28.
Use formula: Use the formula for the nth term of an arithmetic sequence: an=a1+(n−1)d. We need to find the 73rd term (a73), so n=73, a1=−28, and d=−6.
Calculate 73rd term: Substitute the values into the formula and calculate the 73rd term.a73=−28+(73−1)(−6)a73=−28+(72)(−6)a73=−28−432a73=−460
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