Posted by Benjamin on Sunday, February 3, 2013 at 9:16am.
Statistics??
What's the SUBJECT??
a10=a1+r(10-1)
14=7+r(9)
r=7/9
check
7, 7 7/9, 7 14/9, 7 21/9, 7 28/9, 7 35/9, 7 42/9, 7 49/9, 7 56/9, 14
Use the formulas for sum, knowing r, a1
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