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Hoà Vũ
12/01/2018 at 21:15
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0
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Let 3 be real numbers A, B, C such that the equation:\(AX^2+BX+C=0\) has two solutions \(\left[0;1\right]\). Find the largest value of the expression: \(P=\dfrac{\left(A-B\right)\left(2A-B\right)}{A\left(A-B+C\right)}\)
 
 
 
 
 
 
 


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baohong912006
14/01/2018 at 15:20
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undefined

  • ...
    Supper Saiyan Vegito 16/01/2018 at 18:18

    RONALDO HẢ?


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Lê Quốc Trần Anh Coordinator
15/01/2018 at 18:03
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4
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What is the value of
tan$(90 - 2a)$ given tan$(a) = \frac{1}{2}$

  • ...
    FA FIFA Club World Cup 2018 16/01/2018 at 21:00

    tan(a)=12⇔a=26,5605118

    ⇒tan(90−2a)=tan(90−2⋅26,56505118)=34

  • ...
    Fc Alan Walker 22/01/2018 at 12:29

    tan(a)=12⇔a=26,5605118

    ⇒tan(90−2a)=tan(90−2⋅26,56505118)=34

  • ...
    Alone 16/01/2018 at 13:10

    Dao Trong Luan:Why? tan(a)=\(\dfrac{1}{2}\) can \(\Rightarrow a=26,5605118\)

    This is you use calculator for calculate


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Uchiha Sasuke
16/01/2018 at 19:41
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Given the triangle ABC such that BAc = 80o, AB = AC, M is a point inside the triangle such that MBC = 10o, MCB = 30o. What is the measurement of AMB?

Triangle


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Đỗ Duy Mạnh
11/04/2017 at 11:15
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10
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Between the numbers : 321 and 323 is how much ?

number

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    Siêu nhân họ Đỗ 11/04/2017 at 20:15

    That number is 322

    Đỗ Duy Mạnh selected this answer.
  • ...
    Đỗ Duy Mạnh 11/04/2017 at 20:08

    \(That\) \(number\) \(is\) \(322\)

  • ...
    Vũ Hà Vy Anh 11/04/2017 at 17:49

    i think is 322


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Kaya Renger Coordinator
15/08/2017 at 22:45
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Given a,b,c are positive real numbers so that abc = 1

Prove that : \(\dfrac{b+c}{\sqrt{a}}+\dfrac{c+a}{\sqrt{b}}+\dfrac{a+b}{\sqrt{c}}\ge\sqrt{a}+\sqrt{b}+\sqrt{c}+3\)

Good luck :) 

  • ...
    AL 16/08/2017 at 15:58

    Use AM-GM's ineq:

    \(\dfrac{b+c}{\sqrt{a}}+\dfrac{c+a}{\sqrt{b}}+\dfrac{a+b}{\sqrt{c}}\ge\dfrac{2\sqrt{bc}}{\sqrt{a}}+\dfrac{2\sqrt{ca}}{\sqrt{b}}+\dfrac{2\sqrt{ab}}{\sqrt{c}}\)

    \(=\left(\sqrt{\dfrac{bc}{a}}+\sqrt{\dfrac{ca}{b}}\right)+\left(\sqrt{\dfrac{ca}{b}}+\sqrt{\dfrac{ab}{c}}\right)+\left(\sqrt{\dfrac{ab}{c}}+\sqrt{\dfrac{bc}{a}}\right)\)

    \(\ge\sqrt{a}+\sqrt{b}+\sqrt{c}+\sqrt{a}+\sqrt{b}+\sqrt{c}\)

    \(\ge\sqrt{a}+\sqrt{b}+\sqrt{c}+3\sqrt[3]{abc}\)\(=\sqrt{a}+\sqrt{b}+\sqrt{c}+3\)

    Selected by MathYouLike

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Uchiha Sasuke
26/01/2018 at 07:48
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Given a third degree polynomial P (x). Find the coefficient of x3 of P (x) such that P(0) = 10; P(1) = 12; P(2) = 4; P(3) = 1 

Polynomial


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Lucy Cinder
13/03/2017 at 21:28
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3
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John has 15 candies and Tom has 31 candies. How many candies does Tom need to give to John so that each boy will have the same number of candies?

  • ...
    Nguyễn Trần Thành Đạt 13/03/2017 at 23:03


    The total number of candy John and Tom ia:

    15+31=46( candies)

    Tom need to give to John so that each boy will have the same number of candies is:

    31-46:2=8(candies)

    Answer: 8 candies.

    Selected by MathYouLike
  • ...
    MSN 15/03/2017 at 18:49

    The total number of candy John and Tom ia:
    15+31=46( candies)
    Tom need to give to John so that each boy will have the same number of candies is:
    31-46:2=8(candies)
    Answer: 8 candies

  • ...
    Nguyễn Phương Linh 24/03/2017 at 21:58

    The total candies of John and Tom is:

    15 + 31 = 46 (candies)

    The number of candies that Tom needs to give John so that each boy will have the same number of candies is:

    31 - (46 : 2) = 8 (candies)

                         Answer: 8 candies.


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longia
28/08/2017 at 15:02
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3
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10 + 20 + 60 + 40 + 80 + 90=?

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    Help you solve math 28/08/2017 at 15:06

    1st way :10 + 20 + 60 + 40 + 80 + 90

    =(1 + 2 + 6 + 4 + 8 + 9) x 10

    =30 x 10

    =300

    2nd way :10 + 20 + 60 + 40 + 80 + 90

    =(10 + 90) + (20 + 80)  + (60 + 40)

    =100 + 100 + 100

    =100 x 3

    =300

    longia selected this answer.
  • ...
    I like math 28/08/2017 at 18:03

    10+20+60+40+80+90

    =(10+90)+(20+80)+(60+40)

    =100+100+100

    =300thanghoa

  • ...
    longia 28/08/2017 at 15:08

    thank you


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Baddy
04/02/2018 at 18:41
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3
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gianroiI don't know this question:There are 5 salmons,2 sharks,2 dolphins and 67 mackerels.How many fish are there?

(A).76 fish                  (B).54 fish                   (C) 72 fish                 (D) 73 fish

Math Violympic

  • ...
    Summer Clouds 09/02/2018 at 18:15

    *

    5+2*2+67

    =5+4+67

    =9+67

    =76*

  • ...
    FA KAKALOTS 07/02/2018 at 18:07

    answer: A. 76 fish

    5+2*2+67

    =5+4+67

    =9+67

    =76

  • ...
    Veredizh Sopank 06/02/2018 at 17:16

    answer: A. 76 fish

    5+2*2+67

    =5+4+67

    =9+67

    =76


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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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