Question

An arithmetic series is represented by the equation (picture). Which of the following is true?

Answer 1

Answer:

C

Step-by-step explanation:

In arithmetic series

$\sum \limits _{k=1}^{24}(-6+0.5k)$

we have

$a_1=-6+0.5\cdot 1=-5.5\\ \\a_{24}=-6+0.5\cdot 24=-6+12=6\\ \\S_{24}=\dfrac{a_1+a_{24}}{2}\cdot 24=\dfrac{-5.5+6}{2}\cdot 24=0.5\cdot 12=6$

Thus, the value of the series is equal to the value of the 24th number in the series.

Answer 2

Answer:

The answer is C on Edge2020

Step-by-step explanation:

:)