Q. Find the 77th term of the arithmetic sequence 14,3,−8,…Answer:
Use Arithmetic Sequence Formula: To find the 77th 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.
Identify First Term: First, we identify the first term a1 of the sequence, which is given as 14.
Find Common Difference: Next, we need to find the common difference d. We can do this by subtracting the second term from the first term:d=3−14d=−11
Calculate 77th Term: Now that we have the first term and the common difference, we can find the 77th term a77 using the formula:a77=a1+(77−1)da77=14+(76)(−11)
Calculate 77th Term: Now that we have the first term and the common difference, we can find the 77th term a77 using the formula:a77=a1+(77−1)da77=14+(76)(−11)We perform the multiplication and addition to find a77:a77=14+(76)(−11)a77=14−836a77=−822
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