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The derivative of the function 
f is defined by 
f^(')(x)=(x^(2)-x)cos(x). If 
f(-3)=-6, then use a calculator to find the value of 
f(6) to the nearest thousandth.
Answer:

The derivative of the function f f is defined by f(x)=(x2x)cos(x) f^{\prime}(x)=\left(x^{2}-x\right) \cos (x) . If f(3)=6 f(-3)=-6 , then use a calculator to find the value of f(6) f(6) to the nearest thousandth.\newlineAnswer:

Full solution

Q. The derivative of the function f f is defined by f(x)=(x2x)cos(x) f^{\prime}(x)=\left(x^{2}-x\right) \cos (x) . If f(3)=6 f(-3)=-6 , then use a calculator to find the value of f(6) f(6) to the nearest thousandth.\newlineAnswer:
  1. Integrate f(x)f'(x): To find f(6)f(6), we need to integrate the derivative f(x)f'(x) to get the original function f(x)f(x). The integral of f(x)=(x2x)cos(x)f'(x) = (x^2 - x)\cos(x) will give us f(x)f(x) up to a constant CC.
  2. Use calculator for integration: We integrate f(x)=(x2x)cos(x)f'(x) = (x^2 - x)\cos(x) using integration by parts or a calculator with symbolic integration capabilities. However, since the problem asks us to use a calculator, we will assume the use of a calculator for this step.
  3. Find constant CC: After integrating, we get f(x)=(x2x)cos(x)dx+Cf(x) = \int(x^2 - x)\cos(x) \, dx + C, where CC is the constant of integration. We need to find the value of CC using the initial condition f(3)=6f(-3) = -6.
  4. Solve for C: We plug x=3x = -3 into the integrated function to solve for C: f(3)=(32(3))cos(3)dx+C=6f(-3) = \int(-3^2 - (-3))\cos(-3) \, dx + C = -6.
  5. Calculate definite integral: We use the calculator to find the definite integral from 3-3 to 66 of (x2x)cos(x)dx(x^2 - x)\cos(x) \, dx. This will give us the change in f(x)f(x) from f(3)f(-3) to f(6)f(6).
  6. Apply Fundamental Theorem of Calculus: We add the result of the definite integral to the initial value f(3)=6f(-3) = -6 to find f(6)f(6). This is because the Fundamental Theorem of Calculus tells us that the definite integral from aa to bb of f(x)dxf'(x) \, dx is equal to f(b)f(a)f(b) - f(a).
  7. Find definite integral II: Using the calculator, we find the definite integral from 3-3 to 66 of (x2x)cos(x)dx(x^2 - x)\cos(x) \, dx. Let's denote this value as II.
  8. Calculate f(6)f(6): We calculate f(6)=f(3)+I=6+If(6) = f(-3) + I = -6 + I.
  9. Round to nearest thousandth: We round the result to the nearest thousandth as the problem asks for the answer in that precision.

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