Q. Evaluate ∫05(7e0.2x+4x)dx and express the answer in simplest form.Answer:
Identify Integral: Identify the integral to be solved.We need to evaluate the integral of the function 7e0.2x+4x with respect to x from 0 to 5.
Break into Two: Break the integral into two separate integrals.The integral of a sum is the sum of the integrals, so we can write:\int(\(7e^{0.2x} + 4x)\,dx = \int 7e^{0.2x}\,dx + \int 4x\,dx
Evaluate First Integral: Evaluate the first integral ∫7e0.2xdx. To integrate 7e0.2x, we can use the substitution method or recognize that the integral of eax is (1/a)eax, where a is a constant. So, ∫7e0.2xdx=(7/0.2)e0.2x=35e0.2x
Evaluate Second Integral: Evaluate the second integral ∫4xdx.The integral of 4x with respect to x is 24x2, which simplifies to 2x2.So, ∫4xdx=2x2
Combine Results: Combine the results of the two integrals.The combined integral is 35e0.2x+2x2.
Apply Limits: Apply the limits of integration from 0 to 5. We need to evaluate (35e0.2x+2x2) from x=0 to x=5. So, we calculate (35e0.2×5+2×52)−(35e0.2×0+2×02).
Perform Upper Limit: Perform the calculations for the upper limit x=5. For x=5, we have 35e(0.2×5)+2×52=35e1+2×25=35e+50.
Perform Lower Limit: Perform the calculations for the lower limit x=0. For x=0, we have 35e(0.2⋅0)+2⋅02=35e0+0=35⋅1=35.
Subtract Values: Subtract the value at the lower limit from the value at the upper limit.(35e+50)−35=35e+50−35=35e+15.
Write Final Answer: Write the final answer.The integral from 0 to 5 of the function 7e0.2x+4x is 35e+15.
More problems from Evaluate definite integrals using the chain rule