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JEE Mains · Maths · STD 11 - 4.2 Quadratic equations and inequations

यदि समीकरण \(375 x^{2}-25 x-2=0\) के मूल \(\alpha\) तथा \(\beta\) तो \(\lim _{n \rightarrow \infty} \sum_{r=1}^{n} \alpha^{r}+\lim _{n \rightarrow \infty} \sum_{r=1}^{n} \beta^{r}\) बराबर है

  1. A \(\frac{1}{{12}}\)
  2. B \(\frac{{29}}{{358}}\)
  3. C \(\frac{7}{{116}}\)
  4. D \(\frac{{21}}{{346}}\)
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Answer & Solution

Correct Answer

(A) \(\frac{1}{{12}}\)

Step-by-step Solution

Detailed explanation

\(375 x^{2}-25 x-2=0\) \(\alpha+\beta=\frac{25}{375}, \alpha \beta=\frac{-2}{375}\) \(\Rightarrow\left(\alpha+\alpha^{2}+\ldots \text { upto infinite terms }\right)\) \(+\left(\beta+\beta^{2}+\ldots \ldots \text { upto infinite terms }\right)\)…
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