Mathematics, 23.07.2019 03:00 jiggyN
Find the sum of last ten terms of the ap : 8, 10, 126.
Answers: 1
![S _{10} = \frac{10}{2} [ 2a + (10 - 1)d ] \:](/tpl/images/0121/9066/0af35.png)
![= 5 [2(126) + 9( - 2) ]](/tpl/images/0121/9066/e8723.png)
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