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Mathematics 10 Online
OpenStudy (anonymous):

What is the sum of the arithmetic sequence 9, 14, 19, …, if there are 34 terms? 3,077 3,111 3,145 3,179

OpenStudy (saifoo.khan):

Use \[S_n = \frac n2 (a +L)\]

OpenStudy (saifoo.khan):

Find the last term first.

OpenStudy (anonymous):

|dw:1334599019030:dw|

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