SOLUTION: http://imageshack.us/photo/my-images/824/page679.jpg/ I need help number 11 Please!

SOLUTION: http://imageshack.us/photo/my-images/824/page679.jpg/ I need help number 11 Please!

Algebra.Com

Question 475976: http://imageshack.us/photo/my-images/824/page679.jpg/
I need help number 11 Please!
Answer by Tatiana_Stebko(1539) (Show Source): You can put this solution on YOUR website!

if

...

8, 6, 4, ... the arithmetic series
,
Use formula
, ,

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