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831

Q:

If $$ {8x\over{2x^{2}+7x-2}}=1, x>0,$$ then what is the value of of $$ {x^{3}+{1\over x^{3}}}$$ ?

  • 1
    $$ {3\over 8}{\sqrt{17}}$$
  • 2
    $$ {3\over 4}{\sqrt{17}}$$
  • 3
    $$ {5\over 8}{\sqrt{17}}$$
  • 4
    $$ {5\over 4}{\sqrt{17}}$$
  • Show Answer
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Answer : 3. "$$ {5\over 8}{\sqrt{17}}$$"

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