So sánh:
a) -2,5 và -2,125; b) \( - \frac{1}{{10000}}\) và \(\frac{1}{{23456}}\)
K
Khách
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và 4format('truetype')%3Bfont-weight%3Anormal%3Bfont-style%3Anormal%3B%7D%3C%2Fstyle%3E%3C%2Fdefs%3E%3Cpolyline%20fill%3D%22none%22%20points%3D%2212%2C-16%2011%2C-16%205%2C0%202%2C-6%22%20stroke%3D%22%23000000%22%20stroke-linecap%3D%22square%22%20stroke-width%3D%221%22%20transform%3D%22translate(0.5%2C20.5)%22%2F%3E%3Cpolyline%20fill%3D%22none%22%20points%3D%225%2C0%202%2C-6%200%2C-5%22%20stroke%3D%22%23000000%22%20stroke-linecap%3D%22square%22%20stroke-width%3D%221%22%20transform%3D%22translate(0.5%2C20.5)%22%2F%3E%3Cline%20stroke%3D%22%23000000%22%20stroke-linecap%3D%22square%22%20stroke-width%3D%221%22%20x1%3D%2212.5%22%20x2%3D%2233.5%22%20y1%3D%224.5%22%20y2%3D%224.5%22%2F%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2223.5%22%20y%3D%2219%22%3E15%3C%2Ftext%3E%3Ctext%20font-family%3D%22math117e62166fc8586dfa4d1bc0e17%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2241.5%22%20y%3D%2219%22%3E%2B%3C%2Ftext%3E%3Ctext%20font-family%3D%22Arial%22%20font-size%3D%2216%22%20text-anchor%3D%22middle%22%20x%3D%2253.5%22%20y%3D%2219%22%3E4%3C%2Ftext%3E%3C%2Fsvg%3E)
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1
18 tháng 10 2021
a: \(11^{14}< 11^{15}\)
b: \(4^{300}=64^{100}\)
\(3^{400}=81^{100}\)
mà 64<81
nên \(4^{300}< 3^{400}\)
NN
14 tháng 9 2021
a, Có 3 = (3
)
= 9
và 2
= (2
)
= 8
=> 3
> 2
b, Có 6 = (6
)
= 36
=> 6
> 12
26 tháng 1 2023
37,37 x 5959,59 = 37 x 1,01 x 59 x 101,01 = 37 x 59 x 1,01 x 101,01
59,59 x 3737,37 = 59 x 1,01 x 37 x 101,01 = 37 x 59 x 1,01 x 101,01
=> 37,37 x 5959,59 = 59,59 x 3737,37
Kick mik nha
DT
Dang Tung
CTVHS
14 tháng 6 2023
\(\dfrac{11}{-13}=-\dfrac{11}{13}=-\dfrac{13}{13}+\dfrac{2}{13}=-1+\dfrac{2}{13}\\ -\dfrac{14}{15}=-\dfrac{15}{15}+\dfrac{1}{15}=-1+\dfrac{1}{15}\)
Ta thấy : \(\dfrac{1}{15}< \dfrac{1}{13}< \dfrac{2}{13}=>-1+\dfrac{1}{15}< -1+\dfrac{2}{13}\)
hay \(\dfrac{11}{-13}>-\dfrac{14}{15}\)
QT
1
HQ
Hà Quang Minh
Giáo viên
16 tháng 9 2023
a) Ta có: 3,23 < 3,32 nên -3,23 > -3,32
b) Ta có: \( - \frac{7}{3} = \frac{{ - 28}}{{12}}; - 1,25 = \frac{{ - 125}}{{100}} = \frac{{ - 5}}{4} = \frac{{ - 15}}{{12}}\)
Vì -28 < -15 nên \(\frac{{ - 28}}{{12}} < \frac{{ - 15}}{{12}}\) hay \( - \frac{7}{3}\) < -1,25
14 tháng 12 2016
Tớ thấy : A = 1005 x 1005 = 1010025
B = 1000 x 1010 = 1010000
Vậy A > B
14 tháng 12 2016
A = 1005x1005 = (1000+5)x(1010-5) =1000x1010 x 5x1010 - 5x1000 - 25 = 1000x1010 - 25 = B - 25
Vậy B > A
KS
14 tháng 5 2022
`3^(2 + n) và 2^(3 + n) `
`3^(2 + n) = 3^2 xx 3^n = 9 xx 3^n`
`2^(3 + n) = 2^3 xx 2^n = 8 xx 2^n`
ta thấy `9>8 ; 3^n > 2^n `
vậy `3^(2 + n) > 2^(3 + n) `
NA
6
25 tháng 3 2021
a) 3^2 và 3.2
3^2=9
3.2=6
-> 3^2>3.2
b)2^3 và 3^2
2^3=8
3^2=9
-> 2^3<3^2
c) 3^3 và 3^4
Vì hai số có cùng cơ số nên ta so sánh số mũ
3<4
-> 3^3<3^4
25 tháng 3 2021
a)ta có 32=9 ; 3.2=6 => 32 > 3.2
b)ta có 23=8 ; 32=9 => 23 < 32
c) ta có 33 và 34
vì 2 số đều cùng 1 cơ số
mà cơ số đầu có số mũ = 3,cơ số còn lại có lũy thừa =4
=> 3<4
=> 33<34
a) Vì 2,5 > 2,125 nên -2,5 < -2,125
b) Vì \( - \frac{1}{{10000}}\)< 0 và 0 < \(\frac{1}{{23456}}\)nên \( - \frac{1}{{10000}}\) < \(\frac{1}{{23456}}\)
Chú ý: Số hữu tỉ âm luôn nhỏ hơn số hữu tỉ dương.