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435

Q:

 if $$x^4+{16\over x^4}=15617, x>0$$ then find the value of $$x+{2\over x}$$

  • 1
    $$ \sqrt {121} $$
  • 2
    $$ \sqrt {127} $$
  • 3
    $$ \sqrt {129} $$
  • 4
    $$ \sqrt {123} $$
  • Show Answer
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Answer : 3. "$$ \sqrt {129} $$"

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