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Question

Find the sum of the first $70$ terms of the arithmetic sequence with first term $10$ and common difference $\frac{1}{2}$.

Solutions

VerifiedSolution A

Solution B

Answered 1 year ago

Step 1

1 of 5In this task, we are given that the first term

$a_1=10$

and the common difference

$d=\frac{1}{2}.$

We have to determine the sum of the starting $70$ terms of this arithmetic sequence.

Answered 2 years ago

Step 1

1 of 5To determine the sum of the first $70$ terms of the arithmetic sequence with first term is $10$ and the common difference $1/2$ we will use this equation below.

$s_n=\frac{n}{2}(a_1+a_n)$

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