A: [img=50x46]180311112f92e8c.png[/img]
B: [img=50x46]1803111137747be.png[/img]
C: [img=50x46]180311114135b5f.png[/img]
D: [img=50x46]180311114ab83f4.png[/img]
举一反三
- 信号[img=134x27]1803243d79cc513.png[/img]的傅里叶变换为（ ）。 A: [img=50x46]1803243d82f6aac.png[/img] B: [img=50x46]1803243d8bd6b82.png[/img] C: [img=50x46]1803243d948b909.png[/img] D: [img=50x46]1803243d9d0d684.png[/img]
- 下列各函数中，与函数[img=50x26]1803cfe3bcfadca.png[/img]为同一个函数的是 A: [img=66x29]1803cfe3c5cef8d.png[/img] B: [img=50x46]1803cfe3ce7f973.png[/img] C: [img=80x27]1803cfe3d7424a8.png[/img] D: y=x|x|
- 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}
- 信号[img=120x27]1803c96bf3492b8.png[/img]的傅里叶变换等于 A: [img=50x46]1803c96bfbe4545.png[/img] B: [img=50x47]1803c96c0483e3b.png[/img] C: [img=42x47]1803c96c0d1dc65.png[/img] D: [img=117x46]1803c96c1498e97.png[/img]
- 信号[img=120x27]180378142e737b4.png[/img]的傅里叶变换等于 A: [img=50x46]1803781437e175a.png[/img] B: [img=50x47]18037814408683a.png[/img] C: [img=42x47]18037814497c6c7.png[/img] D: [img=117x46]18037814531ed5b.png[/img]
内容
- 0
信号[img=120x27]1803bd25c980ce4.png[/img]的傅里叶变换等于 A: [img=50x46]1803bd25d1dc1cd.png[/img] B: [img=50x47]1803bd25da4f110.png[/img] C: [img=42x47]1803bd25e2f96fe.png[/img] D: [img=117x46]1803bd25ebf3458.png[/img]
- 1
信号[img=120x27]1803bf944400483.png[/img]的傅里叶变换等于 A: [img=50x46]1803bf944c34f12.png[/img] B: [img=50x47]1803bf94543fcab.png[/img] C: [img=42x47]1803bf945c645e8.png[/img] D: [img=117x46]1803bf946501b15.png[/img]
- 2
信号[img=120x27]1802d523d140896.png[/img]的傅里叶变换等于 A: [img=50x46]1802d523d995de2.png[/img] B: [img=50x47]1802d523e146a9c.png[/img] C: [img=42x47]1802d523ea254f0.png[/img] D: [img=117x46]1802d523f33e5ac.png[/img]
- 3
信号[img=120x27]1803623a58632b2.png[/img]的傅里叶变换等于 A: [img=117x46]1803623a60d3ad6.png[/img] B: [img=42x47]1803623a69f3bc3.png[/img] C: [img=50x47]1803623a725a716.png[/img] D: [img=50x46]1803623a7a71721.png[/img]
- 4
信号[img=120x27]1803718889c4712.png[/img]的傅里叶变换等于 A: [img=50x46]18037188927c091.png[/img] B: [img=50x47]180371889b7d313.png[/img] C: [img=42x47]18037188a3ef4a8.png[/img] D: [img=117x46]18037188ac49358.png[/img]