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Differentiate integer powers (mixed positive and negative)

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What is the value of start fraction, d, divided by, d, x, end fraction, left parenthesis, start fraction, 9, divided by, x, cubed, end fraction, plus, start fraction, 1, divided by, x, end fraction, right parenthesis at x, equals, minus, 3?
  • Your answer should be
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4