Which term in the A.P. 68, 64 60, ... is – 8?
Answers
Answered by
2
Answer:
n=20
Step-by-step explanation:
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Answered by
17
Answer :-
Here,
- a = 68
- d = 64 - 68 = - 4
- Tn = - 8
Tn = a + (n - 1)d
→ - 8 = 68 + (n - 1)(-4)
→ - 8 = 68 - 4n + 4
→ - 8 = 72 - 4n
→ 72 + 8 = 4n
→ 80 = 4n
→ n = 20
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