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Let \( a_{1}, a_{2}, a_{3}, \ldots \) be a G.P. such that \( a_{1}<0, a_{1}+a_{2}=4 \) and \( a_{3}+a_{4}=16 \). If \…

Q1

Let \( a_{1}, a_{2}, a_{3}, \ldots \) be a G.P. such that \( a_{1}<0, a_{1}+a_{2}=4 \) and \( a_{3}+a_{4}=16 \). If \( \sum_{\mathrm{i}=1}^{9} a_{i}=4 \lambda \), then \( \lambda \) is equal to :

[JEE Main 2020, 7 Jan (Shift 2)]

a

\( -171 \)

b

\( 171 \)

c

\( \frac{511}{3} \)

d

\( -513 \)

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