$2\sqrt{3} - \sqrt{7}$ का परिमेयकारी गुणक (rationalising factor) क्या है?

  • A
    $\sqrt{3} + \sqrt{7}$
  • B
    $2\sqrt{3} + \sqrt{7}$
  • C
    $\sqrt{3} + 2\sqrt{7}$
  • D
    इनमें से कोई नहीं

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माना $\frac{7}{2^{1/2} + 2^{1/4} + 1} = A + B \cdot 2^{1/4} + C \cdot 2^{1/2} + D \cdot 2^{3/4}$ है,जहाँ $A, B, C, D$ परिमेय संख्याएँ हैं। तब निम्नलिखित में से कौन सा सत्य है?

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