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Multiple Choice
Evaluate the indefinite integral. ∫(x−ex)dx
A
32x32−ex+C
B
32x23−xex+C
C
32x23−ex+C
D
32x32−x1ex+C
Verified step by step guidance
1
Step 1: Break the integral into two separate terms for easier evaluation. The given integral is ∫(√x - e^x) dx, which can be rewritten as ∫√x dx - ∫e^x dx.
Step 2: For the first term, ∫√x dx, rewrite √x as x^(1/2). Use the power rule for integration, which states that ∫x^n dx = (x^(n+1))/(n+1) + C, where n ≠ -1.
Step 3: Apply the power rule to x^(1/2). Add 1 to the exponent (1/2 + 1 = 3/2) and divide by the new exponent (3/2). This gives (2/3)x^(3/2).
Step 4: For the second term, ∫e^x dx, recall that the integral of e^x is simply e^x. So, the result of this term is -e^x (note the negative sign from the original integral).
Step 5: Combine the results of both terms. The final expression for the indefinite integral is (2/3)x^(3/2) - e^x + C, where C is the constant of integration.