Fill-in the box below only with letters a, b, c, or d. Do not type in the full answer.Answer questions 1-3 using the given3x7dx.4+x81. What is the representation of "u"? 1.a. u = x3b. u = x° +4c. u = x4d. u = x* +22. What is "du"? 2.a. du = 8x' dxb. du = (8x'+4 dxc. du = 4x dxd. du = 4x +2 dx3xdx? 3.83. What is the4 + x°8In x° +4 +c8.3b.In8.a.c. 24In x +4 +cd. 121nx +2+cMacBook AirF1F2F3F4F5#2$%&2347QWRTY

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Fill-in the box below only with letters a, b, c, or d. Do not type in the full answer. Answer questions 1-3 using the given 3x7 dx. 4+x8 1. What is the representation of "u"? 1. a. u = x8 b. u =x° +4 c. u x d. u = x4 +2 2. What is "du"? 2. a. du = 8x dx b. du = (8x'+4 dx %3! c. du = 4x° dx d. du = (4x +2) dx %3D %3D 3x dx? 3. 3. What is the 4+ x8 3Inx8 +4 +c 3 a. b. In 80 8 8 C. 24ln x° +4 +c d. 12ln x* +2+c SEP 27 MacBook Air