Q. Evaluate ∫020(9e0.2x+2)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 9e0.2x+2 with respect to x from 0 to 20.
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(\(9e^{0.2x} + 2)\,dx = \int 9e^{0.2x}\,dx + \int 2\,dx
Evaluate First Integral: Evaluate the first integral ∫9e(0.2x)dx. To integrate 9e(0.2x), we can use the fact that the integral of e(ax) is (1/a)e(ax), where a is a constant. So, ∫9e(0.2x)dx=(9/0.2)e(0.2x)=45e(0.2x)
Evaluate Second Integral: Evaluate the second integral ∫2dx. The integral of a constant is just the constant times the variable of integration, so: ∫2dx=2x
Combine Results: Combine the results of the two integrals.The combined indefinite integral is:45e0.2x+2x+C, where C is the constant of integration.
Evaluate Definite Integral: Evaluate the definite integral from 0 to 20. We need to calculate (45e0.2x+2x) evaluated at x=20 and subtract the value of the expression evaluated at x=0. F(20)=45e0.2×20+2×20F(0)=45e0.2×0+2×0
Perform Calculations: Perform the calculations for F(20) and F(0).F(20)=45e4+40F(0)=45e0+0=45×1+0=45
Subtract F(0): Subtract F(0) from F(20) to get the value of the definite integral.∫020(9e0.2x+2)dx=F(20)−F(0)=(45e4+40)−45
Simplify Final Answer: Simplify the expression to get the final answer.∫020(9e0.2x+2)dx=45e4+40−45=45e4−5
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