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JEE Mains · Maths · STD 11 - 8. sequence and series

यदि \(\frac{1}{\sqrt{1}+\sqrt{2}}+\frac{1}{\sqrt{2}+\sqrt{3}}+\ldots+\frac{1}{\sqrt{99}+\sqrt{100}}=m\) और \(\frac{1}{1 \cdot 2}+\frac{1}{2 \cdot 3}+\ldots+\frac{1}{99 \cdot 100}=\mathrm{n}\), तो बिंदु \((\mathrm{m}, \mathrm{n})\) किस रेखा पर स्थित है?

  1. A \(11(x-1)-100(y-2)=0\)
  2. B \(11(x-2)-100(y-1)=0\)
  3. C \(11(x-1)-100 y=0\)
  4. D \(11 x-100 y=0\)
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Answer & Solution

Correct Answer

(D) \(11 x-100 y=0\)

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Detailed explanation

\( \frac{1}{\sqrt{1}+\sqrt{2}}+\frac{1}{\sqrt{2}+\sqrt{3}}+\ldots+\frac{1}{\sqrt{99}+\sqrt{100}}=\mathrm{m} \) \( \frac{\sqrt{1}-\sqrt{2}}{-1}+\frac{\sqrt{2}-\sqrt{3}}{-1} \ldots \frac{\sqrt{99}-\sqrt{100}}{-1}=\mathrm{m}\) \( \sqrt{100}-1=\mathrm{m} \Rightarrow \mathrm{m}=9 \)…
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