alleryFirst negative term of the AP 121, 117, 113, ... is the
A30th term
B32nd term
C31st term
D33rd term
Answer & Solution
Correct answer: B. 32nd term
1. a = 121 and d = -4.
2. Set 121 + (n - 1)(-4) < 0 gives n - 1 > 30.25.
3. Smallest integer n is 32.
4. So the 32nd term is the first negative.
_Source: Selina Concise Mathematics Class 10, Ch on Arithmetic Progression (Mistral OCR'd PDF), section on negative term_
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