alleryThe 15th term of the AP 5, 9, 13, ... is
A61
B55
C59
D65
Answer & Solution
Correct answer: A. 61
1. a = 5 and d = 4.
2. a_15 = 5 + 14 * 4.
3. = 5 + 56 = 61.
4. So the 15th term is 61.
_Source: Selina Concise Mathematics Class 10, Ch on Arithmetic Progression (Mistral OCR'd PDF), section on nth term_
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