Q. Evaluate ∫06(10e−0.5x−2x)dx and express the answer in simplest form.Answer:
Break down integral: Break down the integral into two separate integrals.We have the integral of a sum of two functions, which can be separated into the sum of two integrals:\int(\(10e^{(−0.5x)} - 2x)\,dx = \int 10e^{(−0.5x)}\,dx - \int 2x\,dx
Evaluate first integral: Evaluate the first integral ∫010e−0.5xdx. Let u=−0.5x, then du=−0.5dx, which implies dx=−2du. The limits of integration also change with the substitution. When x=0, u=0, and when x=6, u=−3. The integral becomes: ∫010eu⋅−2du=−20∫eudu The integral of eu with respect to u=−0.5x0 is eu, so we have: u=−0.5x2 Substituting back for u=−0.5x0, we get: u=−0.5x4
Evaluate second integral: Evaluate the second integral ∫2xdx. The integral of x with respect to x is (1/2)x2, so we have: ∫2xdx=2×(1/2)x2=x2
Combine results: Combine the results from Step 2 and Step 3.The combined indefinite integral is:−20e(−0.5x)+x2+C
Evaluate definite integral: Evaluate the definite integral from 0 to 6. We need to calculate the value of the combined integral at the upper limit (x=6) and subtract the value at the lower limit (x=0). For the first part, −20e−0.5x, at x=6 we have −20e−3, and at x=0 we have −20e0=−20. For the second part, x2, at x=6 we have 61, and at x=0 we have 63. So the definite integral is: 64
Simplify expression: Simplify the expression.Simplify the expression by combining like terms and calculating the value of e−3.(−20/e3+36)−(−20)=−20/e3+36+20=56−20/e3
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