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Given the function 
f(x)=-sqrt(x^(3))+(3)/(2sqrtx), find 
f^(')(3). Express your answer as a single fraction in simplest radical form.
Answer: 
f^(')(3)=

Given the function f(x)=x3+32x f(x)=-\sqrt{x^{3}}+\frac{3}{2 \sqrt{x}} , find f(3) f^{\prime}(3) . Express your answer as a single fraction in simplest radical form.\newlineAnswer: f(3)= f^{\prime}(3)=

Full solution

Q. Given the function f(x)=x3+32x f(x)=-\sqrt{x^{3}}+\frac{3}{2 \sqrt{x}} , find f(3) f^{\prime}(3) . Express your answer as a single fraction in simplest radical form.\newlineAnswer: f(3)= f^{\prime}(3)=
  1. Find Derivative of f(x)f(x): First, we need to find the derivative of the function f(x)=x3+32xf(x) = -\sqrt{x^3} + \frac{3}{2\sqrt{x}}. To do this, we will use the power rule and the chain rule for derivatives.\newlinef(x)=x3/2+32x1/2f(x) = -x^{3/2} + \frac{3}{2x^{1/2}}\newlineLet's differentiate each term separately.
  2. Apply Power Rule: For the first term x32-x^{\frac{3}{2}}, we apply the power rule which states that the derivative of xnx^n is nxn1n\cdot x^{n-1}. The derivative of x32-x^{\frac{3}{2}} is (32x321)=(32x12)-\left(\frac{3}{2}\cdot x^{\frac{3}{2} - 1}\right) = -\left(\frac{3}{2}\cdot x^{\frac{1}{2}}\right).
  3. Combine Derivatives: For the second term (3)/(2x1/2)(3)/(2x^{1/2}), we also apply the power rule. The derivative of x1/2x^{-1/2} is (1/2)x1/21=(1/2)x3/2(-1/2)\cdot x^{-1/2 - 1} = (-1/2)\cdot x^{-3/2}.\newlineThe derivative of (3)/(2x1/2)(3)/(2x^{1/2}) is (3/2)(1/2)x3/2=(3/4)x3/2(3/2) \cdot (-1/2)\cdot x^{-3/2} = -(3/4)\cdot x^{-3/2}.
  4. Evaluate at x=3x = 3: Now, we combine the derivatives of both terms to get the derivative of the entire function f(x)f(x).f(x)=(32x12)(34x32)f'(x) = -\left(\frac{3}{2}\cdot x^{\frac{1}{2}}\right) - \left(\frac{3}{4}\cdot x^{-\frac{3}{2}}\right)
  5. Simplify Powers of \newline33: Next, we need to evaluate the derivative at \newlinex=3x = 3.\newline\newlinef(3)=((32)312)(34)332f'(3) = -((\frac{3}{2})3^{\frac{1}{2}}) - (\frac{3}{4})3^{-\frac{3}{2}}
  6. Substitute Values: We simplify the expression by calculating the powers of 33. 31/23^{1/2} is the square root of 33, which we can write as 3\sqrt{3}. 33/23^{-3/2} is 11 over the square root of 33 cubed, which simplifies to 1/(33)1/(3\sqrt{3}).
  7. Perform Multiplication and Division: Now we substitute these values into the derivative. f(3)=(323)(34133)f'(3) = -\left(\frac{3}{2}\cdot\sqrt{3}\right) - \left(\frac{3}{4}\cdot\frac{1}{3\sqrt{3}}\right)
  8. Find Common Denominator: We simplify the expression by performing the multiplication and division.\newlinef(3)=(332)(143)f'(3) = -(\frac{3\sqrt{3}}{2}) - (\frac{1}{4\sqrt{3}})
  9. Combine Numerators: To combine these terms into a single fraction, we need a common denominator. The common denominator will be 434\sqrt{3}. \newlinef(3)=6343143f'(3) = -\frac{6\sqrt{3}}{4\sqrt{3}} - \frac{1}{4\sqrt{3}}
  10. Simplify Numerator: Now we can combine the numerators over the common denominator. f(3)=(63)143f'(3) = \frac{-(6\sqrt{3}) - 1}{4\sqrt{3}}
  11. Simplify Numerator: Now we can combine the numerators over the common denominator.\newlinef(3)=(63)143f'(3) = \frac{-(6\sqrt{3}) - 1}{4\sqrt{3}}Finally, we simplify the numerator.\newlinef(3)=63143f'(3) = \frac{-6\sqrt{3} - 1}{4\sqrt{3}}\newlineThis is the derivative of the function f(x)f(x) at x=3x = 3 in simplest radical form.

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