Question

If the 5th term of a gp is 16 and the 10th term is 1/2 then the 15th term is???

Answer 1

Answer:

-759

Step-by-step explanation:

1. a + 4d = 16_______(1)
2. a + 9d = 1/2_______(2)
3. 1-2
4. -5d = 31/2
5. d = - 155/2
6. a + 4×-155/2 = 16
7. a + -310 = 16
8. a = 326
9. a + 14d = 326 + 14 × -155/2
10. 326 + 7× -155
11. 326 + -1085 = - 759

Answer 2

Answer:

1/64

Step-by-step explanation:

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