不等式在數軸上表示

不等式在數軸上表示

不等式在數軸上的表示為一些區間,注意端點,大於等於小於等於為實心點
大於和小於為空心點
很簡單的
如果不等式的解是有限個,在數軸上如何表示?
麻煩附個圖,
解是有限個一般都是幾個數位在數軸上用實心圓點表示
例如(x-1)^2
把解求出來就行了啊然後標在數軸上!!!!!畫線條不是嗎??
“有理數與數軸上的點一一對應”這句話是對的嗎
本人覺得是對的,因為這裡是說“有理數與數軸上的點一一對應”而不是“數軸上的點一一對應有理數”,我覺得有理數對應點沒錯,點對應有理數有錯,這裡沒有無理數的事,反之就因該考慮到有理數.
不對的,一一對應要求很嚴格的,在這裡既要有一個有理數,數軸上就要有一個點,也要求數軸上每一個點都有一個有理數與之對應
嗯,不錯
對啊,不錯!
不對。
實數與數軸上的點是一一對應的。
實數包括有理數和無理數。
關鍵是理解這句話“有理數與數軸上的點一一對應”的問題
邏輯上的話A與B=B與A A∧B
”張三與李四“=”李四與張三“
“有理數與數軸上的點一一對應”
等於
“數軸上的點與有理數一一對應”當然不對了,還有無理數的。…展開
不對。
實數與數軸上的點是一一對應的。
實數包括有理數和無理數。
關鍵是理解這句話“有理數與數軸上的點一一對應”的問題
邏輯上的話A與B=B與A A∧B
”張三與李四“=”李四與張三“
“有理數與數軸上的點一一對應”
等於
“數軸上的點與有理數一一對應”當然不對了,還有無理數的。收起
已知定義在區間(0,正無窮)上的函數f(x)滿足f(X1分之X2)=f(X1)-f(X2),且當X大於1時,f(X)大於0
一、求f(1)的值
二判斷f(X)的單調性
三、若f(3)=-1,解不等式f(X)小於-3
1.設x1=x2=1f(1)=f(1)-f(1)得f(1)=02.設x1>x2>0,則x1/x2>1,f(x1/x2)>0所以,f(x1)-f(x2)=f(x1/x2)>0f(x1)>f(x2)即函數在(0,+無窮)上是增函數.3.f(3)=f(9/3)=f(9)-f(3)=-1f(9)=f(-3)-1=-1-1=-2f(9)=f(27/3)=f(27)-f(3…
求數學算術題150道
請出題
1.45+15×6= 135
2.250÷5×8=400
3.6×5÷2×4=60
4.30×3+8=98
5.400÷4+20×5= 200
6.10+12÷3+20=34
7.(80÷20+80)÷4=21
8.70+(100-10×5)=120
9.360÷40= 9
10.40×20= 800
11.80-25= 55
12.70+45=115
13.90×2= 180
14.16×6= 96
15.300×6= 1800
16.540÷9=60
17.30×20= 600
18.400÷4= 100
19.350-80= 270
20.160+70=230
21.18-64÷8= 10
22.42÷6+20=27
23.40-5×7= 5
24.80+60÷3=100
25.41+18÷2= 50
26.75-11×5= 20
27.42+7-29= 20
28.5600÷80=70
29.25×16= 400
30.120×25= 3000
31.36×11= 396
32.1025÷25=41
33.336+70= 406
34.25×9×4= 900
35.200-33×3= 101
36.3020-1010=2010
37.12×50= 600
38.25×8= 200
39.23×11= 253
40.125÷25=5
41.4200-2200=2000
42.220+80= 300
43.20×8×5= 800
44.600-3×200=0
45.20+20÷2= 30
46.35-25÷5= 30
47.36+8-40= 4
48.2800÷40=70
49.98÷14 = 7
50.96÷24 = 4
51.56÷14 =4
52.65÷13 = 5
53.75÷15 = 5
54.120÷24 =5
55.200÷25 = 8
56.800÷16 = 50
57.840÷21 =40
58.560÷14 = 40
59.390÷13 = 30
60.600÷15 =40
61.72÷24 = 3
62.85÷17 = 5
63.90÷15 =6
64.96÷16 = 6
65.78÷26 = 4
66.51÷17 =3
67.80÷40 = 2
68.100÷20 = 5
69.100÷4 =25
70.240÷40 = 6
71.920÷4 = 230
72.300÷60=5
73.64÷2 = 32
74.64÷4 = 16
75.50÷5 =10
76.60÷8 = 7.5
77.96÷4 = 24
78.90÷6 =15
79.400+80 = 480
80.400-80 = 320
81.40×80 =3200
82.400÷80 = 5
83.48÷16 = 3
84.96÷24 =4
85.160×5= 800
86.4×250= 1000
87.0×518= 0
88.10×76= 760
89.36×10=360
90.15×6= 90
91.24×3= 72
92.5×18= 90
93.26×4= 74
94.7×15=105
95.32×30= 960
96.40×15= 600
97.60×12= 720
98.23×30= 690
99.30×50=1500
100.5×700=3500
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=4÷20=3.5×200=1.5-0.06=
0.75÷15=0.4×0.8=4×0.25=0.36+1.54=
1.01×99=420÷35=25×12=135÷0.5=
3/4 + 1/4 = 2 + 4/9 = 3 - 2/3 = 3/4 - 1/2=
1/6 + 1/2 -1/6 = 7.5-(2.5+3.8)= 7/8 + 3/8 =
3/10 +1/5 = 4/5 - 7/10 = 2 - 1/6 -1/3 =
0.51÷17=32.8+19=5.2÷1.3=1.6×0.4=
4.9×0.7=1÷5=6÷12=0.87-0.49=
17×40=100-63=3.2+1.68=2.8×0.4=
14-7.4=1.92÷0.04=0.32×500=0.65+4.35=
10-5.4=