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

જો \(\alpha \) અને \(\beta \) એ સમીકરણ \(375x^2 -25x -2 = 0\) ના ઉકેલ હોય તો  \(\mathop {\lim }\limits_{n \to \infty } \,\sum\limits_{r = 1}^n {{\alpha ^r}}  + \mathop {\lim }\limits_{n \to \infty } \,\sum\limits_{r = 1}^n {{\beta ^r}} \) iની કિમત મેળવો. 

  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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