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高一数学必修二作业本答案

www.31doc.com/ ( 60 ) ( 12 5 60 ) 1 A{0,1,2,3,4,5}B{1,3,6,9}C {3,7,8}(AB)C () A{0,1,2,6,8}B{3,7,8} C{1,3,7,8}D{1,3,6,7,8} []C []AB{1,3}(AB)C{1,3,7,8} C. 2(09#) R f(x) x1x2[0)(x1x2) f(x2)f(x1)x2x1 Af(3) Cf(2) []A [] x2x1>0 f(x2)f(x1) f(x2) f(x)[0) 1 19 3>2>1f(3) f(x)f(2)f(2) f(3) 3 f(x)g(x). x011 f(x)101 x011 g(x)101 f(g(1))() A1B0 C1D []C []g(1)0f(0)1f(g(1))1. 4 f(x1)3x2 f(x)() A3x2B3x1 C3x1D3x4 []C [] x1t xt1 f(t)3(t1)23t1f(x)3x1. 5 f(x)2x1(x2)x23x(x A7B3 C8D4 []B []f(4)2417f(1)(1)23( 1)4f(4)f(1)3 B. 2 19 6f(x)x2mx (1] m () A{2}B(2] C[2)D(1] []C []f(x)(xm2)2m24 (m2] m21m2 C. 7 AB A*B{xxA xB x#A B}(A*B)*A () AABBAB CADB []D []A*B A B (A*B)*A A A B D. [] A{1,2,3}B{1,5} A*B{2,3,5}(A*B)*A {1,5}B. 8( 20092010 ) a ba2b2a#b(ab)2 f(x)() A 3 19 B C D []A [] # f(x)4x2(x2)22 4x202x2 f(x)4x2(2x)24x2x f(x){x2x f(x)f(x) f(x) 9(08#) f(x)x2x0x2 x>0 f(x)x2 () A[1,1]B[2,2] C[2,1]D[1,2] []A [] 1 x2 f(x)0f(x)x2 BD x2 f(x)0 f(x)x2 C A. 2 x0x2x2 x>0x2x2 1x0 0 10 50 32 27 4 19 () A 32 B 13 C 27 D 9 []D []2732509 27 9 11 f(x)(xR)f(1)12f(x2) f(x)f(2) f(5)() A0B1 C.52D5 []C []f(1)f(12)f(1)f(2)12 f( 1)f(1)12f(2)1 f(5)f(3)f(2)f(1)2f(2)52. 12 f(x)32xg(x)x22xF(x)g(x) f(x)g(x)f(x) f(x) A 3 1 B 727 C 3 D []B 5 19 [] F(x) 3 B. ( 90 ) ( 4 4 16 ) 13(2010#1) A{1,1,3}B{a2 a24}AB{3} a________. []1 []AB{3}3B a244a23a1. 14 yf(n) f(n)2(n1)3f(n1)(n 2) f(3)________. []18 []f(1)2f(2)3f(1)6f(3) 3f(2)18. 15 f(x)2ax(a0)[0,1] a ________ [](0,2] []a0. 2ax0 x2a f(x)(2a] 2a10 16 6 19 800 800 4000 800 14% 4000 11% 420 ________ []3800 [] 400011%440>420 x x x3800() ( 6 74 ) 17( 12 ) A{xaxa3} B{xx5} a (1)AB#(2)ABA. [](1) AB# a5 a2. (2) ABA A#B a>5 a35 a 18( 12 ) f(x) 1 f(0) f(2)3. (1) f(x) (2) f(x)[2aa1] a [](1)f(x) f(0)f(2) x1. f(x) 1 f(x)a(x1)21(a>0) 7 19 f(0)3a2f(x)2(x1)21 f(x)2x24x3. (2) 2a 19( 12 ) f(x) f(x)[5,5] f(1) f(3) [] f(3)>f(1) 20( 12 ) 40cm 60cm [] CDEF CDxCFy AF40y. AFEACB. AFACFEBC 40y40x60 y4023x. S126040x#y23x240x120023(x30)2 600 0 60cm CB CD30cm 40cm AC CF20cm 21( 12 ) 8 19 (1) a (2) a>0 f(x)xax (0 a] [](1)a yx f(x)xax (0)(0) (2)f(x)xax (0a] 0 (x1ax1)(x2ax2)(x1x2)a(x2 x1)x1x2 (x1x2)(1ax1x2)>0 f(x1)>f(x2)f(x)(0a] 22( 14 ) f(x)xag(x)ax. (1) a2 x f(x) (2) F(x) f(x)g(x) F(x)(0a](a>0) [](1)x2 x2x2 x2 2323. (2)F(x)xaax0 F(x)(a1)xa. (a1) F(x)(0a] xa F(x)a2. ( 60 ) ( 12 5 60 ) 1(09#) A{1,3,5,7,9}B 9 19 {0,3,6,9,12} A#NB() A{1,5

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