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प्रश्न
The 2nd term of an AP is 13 and its 5th term is 25. What is its 17th term?
पर्याय
69
73
77
81
MCQ
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उत्तर
73
Explanation:
Let first term = a and common difference = d.
2nd term: a + d = 13.
5th term: a + 4d = 25.
Subtract: 3d = 12 → d = 4.
Then a = 13 – 4 = 9.
17th term = a + 16d
= 9 + 16 × 4
= 9 + 64
= 73
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