Question 3 Evaluate the integral and show your work. Clearly show and justify your steps. a. Use u-subtitution to evaluate the integral f dx 4x³ √x+1 b. fe²cos(e)dx. Hint: note that ex = ee. Start by setting u = e then apply your method of choice to solve the new integral. c. f3(lnx) dx. Hint: start by letting u = (Inx)² and du = 3dx. Instructor: Sanogo 2 d. Using u-substitution evaluate Sa(na) 4 dx 2 Knowledge Check 1 e. Which integral did you find the most challenging to solve. Why? What was the challenge and how did you solve it?

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