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Q:

$$4a-{4\over a}+3=0$$ then the value of :   $$ a^3-{1\over a^3}+3=?$$

  • 1
    $$3\over 16$$
  • 2
    $$7\over 16$$
  • 3
    $$21\over 24$$
  • 4
    $$21\over 16$$
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Answer : 3. " $$21\over 24$$"

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