alleryIf a = 2 and d = 5, the third term of the AP is
A17
B10
C7
D12
Answer & Solution
Correct answer: D. 12
1. Use a_n = a + (n - 1) d with n = 3.
2. a_3 = 2 + (3 - 1)(5).
3. = 2 + 10 = 12.
4. Hence the third term is 12.
_Source: Selina Concise Mathematics Class 10, Ch on Arithmetic Progression (Mistral OCR'd PDF), section on nth term_
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