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प्रश्न
The 7th term of an AP is 4 and its common difference is –4. What is its first term?
विकल्प
16
20
24
28
MCQ
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उत्तर
28
Explanation:
a + 6d = 4
⇒ a + 6 × (–4) = 4
⇒ a = 28
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