第二章参考答案.docx
第二章参考答案0, x< 0L 0<<1练习六1.(1)是,(2)不是;2. F(x) = <43,l<x<241, 2<x3当;4.( =%)=(1产;化=1,2,3,45);5一:3144Z? To fo To7. C; (O. 1(O.9)(2)C; (O.l)3(0.9)2 + C; (O.l)4(0.9)+ Cf(O.l)(3)l-C/(0.1)4(0.9)-C(0.1)5.练习七1.A = 1F(x) =0,x<0xQ<x<l; =(2)/(x) =l,x> 1xe, x>0 0 , x<0(畤34.(1)0.3384,0.5952(2)129.74; 5. 0.0456;6.184.练习八i.X -3 -1 1 3 7 X -3 -1 5 152/ y =11'o,其他410- y>o;o,其他3./伊二2而0,2,-oo<<oo*0;5、/() = <油 y>。0 , y<0自测题1.(1)A3 X -1 1 3 J P 0.4 0.4 0.24。(2)B (3)B (4)D (5)C; 2. 1-0.810;0, y < 05. FY(y) = ly,Q<y<U 6,证明略.i,yl