Practice Problems M141 (Test #1) - Yeah, math, whatever

(b) This one looks like an arctan - let a = 5, and u = x, and: (c) This one is a combination of u-substitution and arctan. What you need to do is break the integral over the common denominator into two separate ones: (the first one uses u-sub, the second arctan) u = x2 + 4. du = 2x dx . so the answer is: ................
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