Q. Find the 64 th term of the arithmetic sequence −30,−39,−48,…Answer:
Identify Terms and Difference: To find the 64th term of an arithmetic sequence, we need to use the formula for the nth term of an arithmetic sequence, which is given by:an=a1+(n−1)dwhere an is the nth term, a1 is the first term, n is the term number, and d is the common difference between the terms.
Calculate 64th Term: First, we identify the first term a1 and the common difference d from the given sequence. The first term a1 is −30. To find the common difference, we subtract the first term from the second term: d=−39−(−30)=−39+30=−9.
Perform Addition and Subtraction: Now we can use the formula to find the 64th term a64:a64=a1+(64−1)da64=−30+(63)(−9)
Perform Addition and Subtraction: Now we can use the formula to find the 64th term a64:a64=a1+(64−1)da64=−30+(63)(−9)Next, we perform the multiplication and addition to find a64:a64=−30+(−567)a64=−30−567a64=−597
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