Question

If first term of gp is 12 and fifth term 55 find 8th term

Answer 1

a = 12......................(1)

a + 4d = 55 ...........(2)

(1) - (2)

- 4d = - 43

4d = 43

d = 10. 75

8th term : a + 7d

12 + 7 × 10.75

12 +75.25

= 87.25

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