Answers

2014-11-04T19:45:05+05:30
2014-11-04T19:49:12+05:30
Tn  = a+(n-1)d
58 = -6+(n-1)4
64 = (n-1)4
16 = n-1
17 = n

there are 17 terms the 8th and 9th terms are in the middle
8th term = a+7d = -6+28 = 22
9th term = a+8d = -6+32 = 26
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