find the common difference of an A.P whose first term is 1/2 and the 8th term is 17/6. Also write its 4th term.

a = 1/2 , a8= 17/6 and let 'd ' be the common difference.

a8= 17/6 = a + (8-1)d

=> d = (17/6 -1/2)/7

=>d = 2

a= a + (4-1) d

=>a= 1/2 + 6 = 13/2.

Hope this helps out.

  • 6
a = 1/2 , a8= 17/6 and let 'd ' be the common difference.a8= 17/6 = a + (8-1)d=> d = (17/6 -1/2)/7=>d = 2a4 = a + (4-1) d=>a4 = 1/2 + 6 = 13/2.The a4 will be 13^2
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