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MATH 124 -
RECOGNIZING INTEGRALS
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Math 124 Name _______________#41 RECOGNIZING INTEGRALS 7.1Although the integrals in each group below have similarities, they require different approaches. For each integral decide which of the following is needed: 1) substitution, 2) algebra or a trig identity, 3)nothing needed, or 4) can’t be done by the techniques in Calculus I. Then evaluate each integral (except for the 4th type of course).1. A. 31x dx2. A. 2xe dx3. A. 21x x dx B. 42 31x x dx B. 3xxedxe B. 21 x dx C. 31x dx C. 3xe dx C. 211dxx D. 231x dx D. 22lnxedxx D. 21xdxxMath 124 Name _______________4. A. cos4dx 5. A. tan(3 )sec(3 )x x dx� B. 21 cos xdx B. 2cosdxx� C. cos sindxx x C. tan cosx xdx D. cossinxdxx D. tan 1dxx
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