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Find 
k^(')(x) if 
k(x)=e^((-x^(1//2)+(1)/(5)x^(-3//5)))

Find k(x) k^{\prime}(x) if k(x)=e(x1/2+15x3/5) k(x)=e^{\left(-x^{1 / 2}+\frac{1}{5} x^{-3 / 5}\right)}

Full solution

Q. Find k(x) k^{\prime}(x) if k(x)=e(x1/2+15x3/5) k(x)=e^{\left(-x^{1 / 2}+\frac{1}{5} x^{-3 / 5}\right)}
  1. Identify Functions: To find the derivative of the function k(x)=e(x(1/2)+x(3/5))k(x) = e^{(-x^{(1/2)} + x^{(-3/5)})}, we will use the chain rule. 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.
  2. Derivative of Outer Function: First, let's identify the outer function and the inner function. The outer function is eue^u, where uu is the inner function. The inner function is u(x)=x1/2+x3/5u(x) = -x^{1/2} + x^{-3/5}.
  3. Derivative of Inner Function: The derivative of the outer function eue^u with respect to uu is eue^u. So, (ddu)(eu)=eu(\frac{d}{du})(e^u) = e^u.
  4. Derivative of x12-x^{\frac{1}{2}}: Now, we need to find the derivative of the inner function u(x)=x12+x35u(x) = -x^{\frac{1}{2}} + x^{-\frac{3}{5}}. We will differentiate each term separately using the power rule, which states that ddx(xn)=nxn1\frac{d}{dx}(x^n) = nx^{n-1}.
  5. Derivative of x35x^{-\frac{3}{5}}: The derivative of x12-x^{\frac{1}{2}} with respect to xx is (12)x121=(12)x12\left(-\frac{1}{2}\right)x^{\frac{1}{2} - 1} = \left(-\frac{1}{2}\right)x^{-\frac{1}{2}}.
  6. Combine Derivatives: The derivative of x(3/5)x^{(-3/5)} with respect to xx is (3/5)x(3/51)=(3/5)x(8/5)(-3/5)x^{(-3/5 - 1)} = (-3/5)x^{(-8/5)}.
  7. Apply Chain Rule: Combining the derivatives of both terms, we get the derivative of the inner function u(x)=(12)x12(35)x85u'(x) = (-\frac{1}{2})x^{-\frac{1}{2}} - (\frac{3}{5})x^{-\frac{8}{5}}.
  8. Substitute into Expression: Now, we apply the chain rule. The derivative of k(x)k(x) with respect to xx is the derivative of the outer function evaluated at the inner function times the derivative of the inner function. So, k(x)=euu(x)k'(x) = e^u \cdot u'(x).
  9. Simplify if Possible: Substitute u(x)u(x) and u(x)u'(x) into the expression for k(x)k'(x). We get k(x)=e(x12+x35)((12)x12(35)x85).k'(x) = e^{(-x^{\frac{1}{2}} + x^{-\frac{3}{5}})} \cdot \left((-\frac{1}{2})x^{-\frac{1}{2}} - (\frac{3}{5})x^{-\frac{8}{5}}\right).
  10. Final Answer: Simplify the expression for k(x)k'(x) if possible. However, in this case, the expression is already in its simplest form. So, the final answer is k(x)=e(x(1/2)+x(3/5))×((1/2)x(1/2)(3/5)x(8/5))k'(x) = e^{(-x^{(1/2)} + x^{(-3/5)})} \times ((-1/2)x^{(-1/2)} - (3/5)x^{(-8/5)}).

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