Write the Word or Phrase That Best Completes Each Statement $\sqrt { x ^ { 4 } + 1 }$

Short Answer

Write the word or phrase that best completes each statement or answers the question.
-y = $\sqrt { x ^ { 4 } + 1 }$ Enter your answer exactly as: $\frac { d y } { d x } = \frac { P ( x ) } { \sqrt { Q ( x ) } }$ where P(x) and Q(x) are polynomials in standard form.