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Find the sum of the arithmetic series given a1 =2, an =35 an n = 12

Find the sum of the arithmetic series given a1 =2, an =35 an n = 12-example-1
User Kenshinji
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1 Answer

6 votes

Given:


a_1=2,a_n=35,n=12

Required:

Find the sum of the arithmetic series.

Step-by-step explanation:

The sum of the arithmetic series when the first and the last term is given by the formula.


S_n=(n)/(2)(a_1+a_n)

Substitute the given values in the formula.


\begin{gathered} S_n=(12)/(2)(2+35) \\ =6(37) \\ =222 \end{gathered}

Final Answer:

Option D is the correct answer.

User Vu Nguyen
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