The 8th term of an ap equal to 3times its 3rd terms .if its sixth term is 22,find the ap
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a + 7d = 3(a + 2d)
a + 5d =22..................{1}
a +7d = 3a + 6d
3a - a = 7d - 7d
2a = d.........................{2}
{2} in {1}
a + 5(2a) =22
a + 10a =22
a = 2.
2(2) = d
d = 4
AP : 2,6,10,14......
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