Question

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

Answer 1

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.