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Phan Huy Toàn
12/08/2017 at 10:20
Answers
1
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Compare: 99^20 and 9999^10

 

  • ...
    Phan Thanh Tinh Coordinator 12/08/2017 at 10:31

    1st way :

    9920 = (992)10 = 980110 < 999910

    2nd way :

    9920 = 9910 x 9910 ; 999910 = 9910 x 10110

    Since 9910 < 10110, 9920 < 999910

    Phan Huy Toàn selected this answer.

...
phanhuytien
12/08/2017 at 10:31
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8
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so sánh 2^332 and 3^223

  • ...
    Phan Huy Toàn 12/08/2017 at 10:37

                        Answer:

    3^223>3^222=(3^2)^111=9^111

    2^322<2^333=(2^3)111=8^111

    Form(1) and (2) deduced:2^332<8^111<9^111<3^223

    Dress:2^332<3^223

    yourself home

    phanhuytien selected this answer.
  • ...
    Flash Shit :3 12/08/2017 at 10:47

    There are something not truth here !!! :V

    Both of you , phanhuytien and Phan Huy Toàn , are you kidding me ???

    Thôi , nói tiếng việt cho dễ 

    Bọn bây đùa nhau ak , 2 bài phải nói là rất khác :V , khác như là cá mè một lứa

    Chép bài nhau :V , trong bài còn có chỗ ta hơi thắc mắc , "Dress" ở đó nghĩa là j , là "váy, đầm" ak , lên google mà trans á , trans được thì trans , ko trans được thì thôi , ở web này thì ko cần mấy bọn dog nhả xương rồi gặm đâu :v 

  • ...
    Kaya Renger Coordinator 12/08/2017 at 10:34

    Ok , compare :))

    We have : \(2^{332}< 2^{333}=\left(2^3\right)^{111}< \left(3^2\right)^{111}=3^{222}< 3^{223}\)

    That is too difficult , right =)) 


...
Kurosaki Akatsu Coordinator
09/03/2017 at 21:15
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4
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Calculate expression value :

a) 4xy3 + \(\dfrac{1}{3}\)xy8 + \(\dfrac{2}{5}xy^3\)+ \(\left(-\dfrac{1}{3}\right)xy^8\) when x = \(\dfrac{2}{3}\) ; y = \(-\dfrac{1}{2}\)

  • ...
    Vũ Thị Hương Giang 09/03/2017 at 21:28

    a) 4xy3 + \(\dfrac{1}{3}\)xy8 + \(\dfrac{2}{5}\)xy3 + \(-\dfrac{1}{3}\)xy8

    = 4xy3 + \(\dfrac{2}{5}\)xy3 + \(\dfrac{1}{3}xy^8\) + \(-\dfrac{1}{3}xy^8\)

    = \(\dfrac{14}{3}xy^3+0=\dfrac{14}{3}xy^3\)

  • ...
    Kurosaki Akatsu Coordinator 09/03/2017 at 21:21

    a) \(4xy^3+\dfrac{1}{3}xy^8+\dfrac{2}{3}xy^3+\left(-\dfrac{1}{3}\right)xy^8\)

    \(=\left(4+\dfrac{2}{3}\right)xy^3+\left[\left(-\dfrac{1}{3}\right)+\dfrac{1}{3}\right]xy^8\)

    \(=\dfrac{14}{3}xy^3+0\)

    \(=\dfrac{14}{3}.\dfrac{2}{3}.\left(-\dfrac{1}{2}\right)^3=-\dfrac{7}{18}\)

  • ...
    FA FIFA Club World Cup 2018 16/01/2018 at 21:58

    a) 4xy3+13xy8+23xy3+(−13)xy8

    =(4+23)xy3+[(−13)+13]xy8

    =143xy3+0

    =143.23.(−12)3=−71


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Phan Minh Anh
02/05/2017 at 12:01
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2
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Each students in a class needs 3 sheets of graph of paper for the math project. Each packet of graph paper holds 25 sheets. There are 28 students in the class. What is the fewest number of packets of graph paper will need for all students?

  • ...
    Vũ Mạnh Hùng 06/12/2017 at 19:28

    we need: 28*3=84

    we have:84:25=3(remaining 9)

    so we need a packet for these 9  sheets of graph of papers

    3+1=4 (packets)

    answer:4 packets

  • ...
    Phan Thanh Tinh Coordinator 03/05/2017 at 22:28

    The number of sheets of graph of paper that the students need is :

    3 x 28 = 84

    We have : 84 : 25 = 3 with remainder 9

    So we need a packet for these 9 sheets of graph of paper.

     Then the answer is : 3 + 1 = 4


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Dung Trần Thùy
19/03/2017 at 21:59
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0
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Help me !

Given 2011 natural numbers \(x_1,x_2,x_3,...,x_{2011}\) satisfy the expression below :

\(\dfrac{1}{(x_1)^{11}}+\dfrac{1}{(x_2)^{11}}+\dfrac{1}{(x_3)^{11}}+...+\dfrac{1}{\left(x_{2011}\right)^{11}}=\dfrac{2011}{2048}\)

Calculate : \(M=\dfrac{1}{\left(x_1\right)^1}+\dfrac{1}{\left(x_2\right)^2}+...+\dfrac{1}{\left(x_{2011}\right)^{2011}}\)


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HỦY DIỆT THE WORLD
27/12/2017 at 19:03
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1
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Find two positive integers equal to 1, so that the sum of them plus \(\dfrac{1}{6}\) their volume is equal \(\dfrac{1}{6}\)

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    KEITA FC 8C 27/12/2017 at 19:10

    we have : \(\dfrac{1}{x}+\dfrac{1}{y}+\dfrac{1}{6xy}=\dfrac{1}{6}\Rightarrow6y+6x+1=xy\)

    \(\Rightarrow\left(x-6\right)\left(y-6\right)=37\) 

    suppose : \(x\ge y\) then \(\left\{{}\begin{matrix}x-6=-1\\y-6=-37\end{matrix}\right.\) or  \(\left\{{}\begin{matrix}x-6=37\\y-6=1\end{matrix}\right.\)

    Case type, the latter case \(x=43\) , \(y=7\)

    Selected by MathYouLike

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Min Hoang moderators
16/03/2017 at 10:16
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0
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Solve the equation \(\sqrt{3+\sqrt{3-\sqrt{3+\sqrt{3-x}}}}=x\)

Equation


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congtung123
23/04/2017 at 20:02
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7
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How many 3 digit numbers are divisible by 2?

  • ...
    congtung123 24/04/2017 at 17:36

    YeuYeuYeu

    thanks

  • ...
    Do Not Ask Why 23/04/2017 at 21:22

    Last number is: 998 

    The first number: 100 

    Số có ba chữ số mà chia hết cho 2 là :

        ( 998 - 100 ) : 2 + 1 = 450 ( numbers )

                                    Đ/s : 450 numbers 

    Easy you hihi

  • ...
    Nguyễn Thanh Huyền 23/04/2017 at 22:54

    The first number is : 100

    Last number is : 998

                   Number with three digits that share for 2 is :

                                  ( 998 - 100 ) : 2 + 1 =  450 ( numbers )

                                               Đ/s : 450 numbers.


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phanhuytien
12/08/2017 at 10:10
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4
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so sánh:

3^400 and 9^200

 

  • ...
    Phan Huy Toàn 12/08/2017 at 10:14

         Answer:

    9^200=(3^2)^200=3^400

    Dress 3^400=9^200

    phanhuytien selected this answer.
  • ...
    phanhuytien 12/08/2017 at 10:17

                                                     Answer;

         3^400=(3^4)^1000=81^1000

         9^2000=(9^2)^1000=81^1000

    Dress 3^400=9^200

  • ...
    Summer Clouds 12/08/2017 at 19:23

    Is Vietnam Maths please post this question in web

    https:olm.vn


...
phanhuytien
13/08/2017 at 08:18
Answers
3
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Tìm x:

2^3=2^x

25=5^x

32=2^x

  • ...
    Kaya Renger Coordinator 13/08/2017 at 14:22

    I'm sorry , i'm wrong at question c !

    We have : 

    25 = 32 = 2x

    => x = 5 

  • ...
    Kaya Renger Coordinator 13/08/2017 at 14:21

    a) 23 = 2x

    <=> \(\dfrac{2^3}{2^x}=1\)

    <=> 23 - x = 1

    <=> 3 - x = 0

    <=> x = 3

    b) 25 = 5x

    <=> 52 = 5x

    => x = 2

    c) 32 = 2x

    <=> 24 = 2x

    <=> x = 4

  • ...
    Help you solve math 13/08/2017 at 08:20

    a,2^3=2^x         b,25=5^x                   c,32=2^x

    x=3                      25 =5^2                      32=2^5


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Trigonometric
sin cos tan cot sinh cosh tanh
Lim-log

Combined operations

 

α β γ δ θ σ ∂ ε ω φ ϕ π μ λ Ψ ξ η χ ζ ι κ ν ψ Ω ρ τ υ Γ Δ Λ Φ Π Σ Υ Ξ ϑ Θ ς ϰ
∞ ⊻ ⩞ ⋎ ⋏ ≀ ∪ ⊎ ⋓ ∩ ⋒ ⊔ ⊓ ⨿ ⊗ ⊙ ⊚ ⊛ ⊘ ⊝ ⊕ ⊖ ⊠ ◯ ⊥
⇔ ⇒ ⇐ → ← ↔ ↑ ↓
Operations
+ - ÷ × ≠ = ⊂ ⊃ ⊆ ⊇ ≈ ∈ ∉ ∃ ∄ ≤ ≥ ± ∓ ≠ ∅ ≃ ≅ ≡ ⋮ ⋮̸ ∀
(□) [□] {□} |□|

The type of system

m×n 1×2 1×3 1×4 1×5 1×6
2×1 2×2 2×3 2×4 2×5 2×6
3×1 3×2 3×3 3×4 3×5 3×6
4×1 4×2 4×3 4×4 4×5 4×6
5×1 5×2 5×3 5×4 5×5 5×6
6×1 6×2 6×3 6×4 6×5 6×6

Recipe:

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