21 Consider the integral x'dx. 3 a. [3 points] Use all three methods to approximate this integral with n = 3. Round your answer to
21 Consider the integral x'dx. 3 a. [3 points] Use all three methods to approximate this integral with n = 3. Round your answer to four decimal places if it is not an integer. b. [1 point] Find the exact value of this integral. x+3 cos (4t) [1 point] Find d dx e at . -15x2
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