Question

the algebraic equation of the arithmetic sequence is ​

Answer 1

Answer:

Given the first three terms and the last term of a finite arithmetic sequence, find the total number of terms. Find the common difference d . Substitute the common difference and the first term into an=a1+d(n−1) a n = a 1 + d ( n − 1 ) . Substitute the last term for an and solve for n .

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