यदि x = \(\frac{4 \sqrt{21} }{ \sqrt7 + \sqrt 3}\) है, तो \(\frac{x + \sqrt{28}}{x - \sqrt{28}} + \frac{x+ \sqrt{12}}{x - \sqrt{12}}\) का मान ज्ञात कीजिए।

1
1
2
2
3
-2
4
-1

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