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OpenStudy (anonymous):
can someone please help me... I need to pass math. what is the sum of the series? A. -220 B. -110 C. -95 D. 110
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OpenStudy (anonymous):
\[\sum_{n-1}^{20} (5-1)\]
OpenStudy (anonymous):
that 1 in the parenthesis is supposed to be an n
OpenStudy (anonymous):
I did the equation but when I add all the number up I get a weird number not one that i need.
OpenStudy (anonymous):
That's an arithmetic sequence because it's linear. You can use this formula |dw:1435279685117:dw|
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