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JEE Mains · Maths · STD 11 - 7. binomial theoram

यदि \(n\), बहुपद \({\left[ {\frac{1}{{\sqrt {5{x^3} + 1}  - \sqrt {5{x^3} - 1} }}} \right]^8} \)\(+ {\left[ {\frac{1}{{\sqrt {5{x^3} + 1}  + \sqrt {5{x^3} - 1} }}} \right]^8}\) की घात है, तथा \(m\) इसमें स्थित \(x ^{ n }\) का गुणांक है, तो क्रमित युग्म \(( n , m )\) बराबर है \(:\)

  1. A \(\left( {12,{{\left( {20} \right)}^4}} \right)\)
  2. B \(\left( {8,5{{\left( {10} \right)}^4}} \right)\)
  3. C \(\left( {24,{{\left( {10} \right)}^8}} \right)\)
  4. D \(\left( {12,8{{\left( {10} \right)}^4}} \right)\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(\left( {12,8{{\left( {10} \right)}^4}} \right)\)

Step-by-step Solution

Detailed explanation

\(\left[\frac{1}{\sqrt{5 x^{3}+1}-\sqrt{5 x^{3}-1}}\right]^{8}+\left[\frac{1}{\sqrt{5 x^{3}+1}+\sqrt{5 x^{3}-1}}\right]^{8}\) After rationalise the polynomial we get =…
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