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April 21, 2014

April 21, 2014

Posted by **Annie** on Tuesday, January 3, 2012 at 6:20pm.

- math -
**Reiny**, Tuesday, January 3, 2012 at 7:11pmeasy ...

d = 3 and

term20 = 137

a+19d = 137

a + 57 = 137

a = 80

now take the sum of first 80 terms

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