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Find ddx49x9\frac{d}{dx}\sqrt{49x^{-9}}

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Q. Find ddx49x9\frac{d}{dx}\sqrt{49x^{-9}}
  1. Identify Function: Identify the function to differentiate.\newlineThe function given is 49x9\sqrt{49x^{-9}}.
  2. Rewrite Function: Rewrite the function in a form that is easier to differentiate.\newlineThe square root of a number is the same as raising that number to the power of 1/21/2. So, 49x9\sqrt{49x^{-9}} can be written as (49x9)1/2(49x^{-9})^{1/2}.
  3. Apply Chain Rule: Apply the chain rule for differentiation. The chain rule states that the derivative of a composite function is the derivative of the outer function evaluated at the inner function times the derivative of the inner function. In this case, the outer function is u(1/2)u^{(1/2)} and the inner function is 49x949x^{-9}.
  4. Differentiate Outer Function: Differentiate the outer function with respect to the inner function.\newlineThe derivative of u(1/2)u^{(1/2)} with respect to uu is (1/2)u(1/2)(1/2)u^{(-1/2)}.
  5. Differentiate Inner Function: Differentiate the inner function with respect to xx. The derivative of 49x949x^{-9} with respect to xx is 9×49x10-9 \times 49x^{-10}.
  6. Combine Derivatives: Combine the derivatives using the chain rule.\newlineThe combined derivative is (12)(49x9)12(949x10)(\frac{1}{2})(49x^{-9})^{-\frac{1}{2}} * (-9 \cdot 49x^{-10}).
  7. Simplify Expression: Simplify the expression.\newlineFirst, simplify (49x9)12(49x^{-9})^{-\frac{1}{2}} to (4912x92)(49^{-\frac{1}{2}}x^{\frac{9}{2}}). Then, multiply this by 9×49x10-9 \times 49x^{-10}.
  8. Further Simplify Expression: Further simplify the expression.\newlineSince 49(1/2)49^{(-1/2)} is the same as 1/491/\sqrt{49} or 1/71/7, the expression becomes (1/7)x(9/2)(9×49x(10))(1/7)x^{(9/2)} * (-9 \times 49x^{(-10)}).
  9. Multiply Constants and Combine Terms: Multiply the constants and combine the xx terms.\newlineThe constants are (17)×(9)×49(\frac{1}{7}) \times (-9) \times 49. The xx terms are x(92)×x(10)x^{(\frac{9}{2})} \times x^{(-10)}, which simplifies to x(112)x^{(-\frac{11}{2})}.
  10. Complete Simplification: Complete the simplification.\newlineThe constants (17)×(9)×49(\frac{1}{7}) \times (-9) \times 49 simplify to 63-63. The final expression is 63x(112)-63x^{(-\frac{11}{2})}.

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