CUET and UG exam JEE Main Mock Test Series 2025 Mathematics Sets

मान लीजिए कि A = {x ∈ \(\mathbb R\) : \(3^x\left(\sum_{r=1}^{\infty}\frac{3}{10^r}\right)^{x-2}<3^{-4x}\) } है, तो A =

1
(-1, ∞)
2
(-1/2, ∞)
3
(0, 1)
4
(1, ∞)
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