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The nth term of an AP with first term a and common difference d is
Aa + n * d directly
Ba + (n - 1) d
Ca * d to the power (n - 1)
Da / (n - 1) when n > 1
Answer & Solution
Correct answer: B. a + (n - 1) d
1. The second term adds d once to a.
2. The nth term adds d a total of (n - 1) times.
3. So a_n = a + (n - 1) d.
4. Hence option A is correct.
_Source: Selina Concise Mathematics Class 10, Ch on Arithmetic Progression (Mistral OCR'd PDF), section on nth term_
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