## KingJ Group Title What is the sum of the arithmetic sequence 8, 14, 20 …, if there are 24 terms? 2 years ago 2 years ago

S = 2a + (n-1)d Where a = first number in sequence, n is nth term you are looking for and d is the common difference.

sorry, it should be: S = n/2( 2a + (n-1)d)

3. Mertsj Group Title

$s _{n}=\frac{n}{2}(a _{1}+a _{n})$ To find the 24th term use: $a _{n}=a _{1}+(n-1)d=8+(24-1)6=146$ $s _{n}=\frac{24}{2}(6+146)$ $s _{n}=1824$

4. Mertsj Group Title

There. I think I finally got it right.

5. KingJ Group Title

THANK YOU

6. Mertsj Group Title

yw

7. cinar Group Title

|dw:1328989953105:dw|

8. cinar Group Title

1848

9. cinar Group Title

you put a1=6 but it is 8

10. cinar Group Title

|dw:1328990276982:dw|