Which term of the A.P. 24, 21, 18, ............ is the first negative term?
A. 8th
B. 9th
C. 10th
D. 12th
Answer: Option C
Solution (By Examveda Team)
an = a + (n - 1) × d where d = -3, Let an = 0⇒ 0 = 24 + (n - 1) × -3
⇒ 0 = 24 - 3n + 3
⇒ 3n = 27
⇒ n = 9
⇒ 10th term will be negative (-ve)
This Question Belongs to Arithmetic Ability >> Progressions
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