Let a₁, a₂, a₃, … be in an A.P. such that Σ_(k=1)¹² a_(2k-1) = -7… | JEE Main 2025 Mathematics PYQ

MCQMediumJEE Main 2025 · 2 April, Shift 1Arithmetic Progression (AP)

Let $a_1, a_2, a_3, \ldots$ be in an A.P. such that $\sum_{k=1}^{12} a_{2k-1} = -\frac{72}{5}a_1$ , $a_1 \neq 0$ . If $\sum_{k=1}^{n} a_k = 0$ , then $n$ is:

A
$11$
B
$10$
C
$18$
D
$17$

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