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October 23, 2014

October 23, 2014

Posted by **Hacker** on Wednesday, October 2, 2013 at 12:19pm.

- Maths -
**Reiny**, Wednesday, October 2, 2013 at 12:27pm2nd term = 8 ----> a+d = 8 , #1

14th term is double the 4th term

a+13d = 2(a+3d)

a+13d = 2a + 6d

a - 7d = 0 , #2

#1 - #2:

8d = 8

d = 1

then a=7

term 10 = a+9d = 7 + 9 = 16

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