A: [img=136x29]1803ae85b896c9e.gif[/img]
B: [img=82x29]1803ae85c1bb375.gif[/img]
C: [img=206x29]1803ae85ca7f6ea.gif[/img]
D: [img=206x29]1803ae85d36e615.gif[/img]
举一反三
- 设D(X)=25,D(Y)=36,[img=58x17]17e0bcfc3a8fb71.jpg[/img],则D(X+Y)=( ) A: 61 B: 85 C: 37 D: 57
- 三阶行列式[img=95x51]17e442a913badef.jpg[/img] A: 27 B: -27 C: 29 D: -29
- 好和坏的隶属函数分别为[img=243x57]18034d63296cac5.png[/img]下列应识别为好的是 A: x=65 B: x=75 C: x=85 D: x=95
- 令F(x):x是有理数,G(x):x是实数。将命题“所有的有理数都是实数,但有的有实数不是有理数”符号化为() 未知类型：{'options': ['17e0a83a4157352.jpgx(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)∧G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)∧[img=10x11]17e0a839b915354.jpg[/img]F(x))', ' [img=8x14]17e0a83a4157352.jpg[/img]x(F(x)[img=14x9]17e0a73094b5dcf.jpg[/img]G(x))∧[img=8x14]17e0a83a35505d4.jpg[/img]x(G(x)[img=14x9]17e0a73094b5dcf.jpg[/img][img=10x11]17e0a839b915354.jpg[/img]F(x))'], 'type': 102}
- 17da4243ce1def6.jpg=2sin（314t+10°）A与[img=10x17]17da4243d8849cc.jpg[/img]=-4sin（314t+95°）A的相位差[img=15x14]17da426d14450d1.jpg[/img]－[img=15x14]17da426d1dc5113.jpg[/img]是 A: 95° B: ﹣85° C: 85°