Question

The 15th term of an AP is 17/6 and
the 19th term is 25/6 what is 12th
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Answer 1

A15 = 17/6

A19 = 25/6

a +14d =17/6

a+ 18 d = 25/6

(-) (-). (-)

-4d = - 8/6

D = 1/3

a + 14/3 =17/6

a + 14 = 17/2

a = 17/2 - 14

a = 17-28/2

a = - 11/2

a12 =a +11d = - 11/2 + 11/3

a12= 11/6

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Answer 2

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