MHB Determine the greatest value of the following expression

  • Thread starter Thread starter max2
  • Start date Start date
  • Tags Tags
    Expression Value
AI Thread Summary
The discussion revolves around determining the maximum value of the expression P given the cubic equation with three positive real roots. Participants inquire about the source of the problem to assess the relevance of the forum for assistance. There is a focus on understanding the progress made by the original poster to provide targeted help. The conversation highlights the importance of context in problem-solving. The thread emphasizes the need for clarity in communication to facilitate effective support.
max2
Messages
4
Reaction score
0
Given that the equation $ax^3-x^2+ax-b=0$, ($a\neq 0,\,b\neq 0$) has three positive real roots.

Determine the greatest value of the following expression:

$$P=\frac{11a^2-3\sqrt3ab-\frac{1}{3}}{9b-10\left ( \sqrt3a-1 \right )}$$
 
Last edited by a moderator:
Mathematics news on Phys.org
From what course is this problem taken?

What progress have you made so far?
 
simple, i love inequality!(h)
 
I asked from what course the problem is taken, so that I could determine if this sub-forum is the best choice.

I asked what you progress so far has been so that our helpers will know just where you are stuck, and be able to provide meaningful help.

Your response addresses neither question.
 
Thank
But I don't have imagine with my problem
 
Was this problem assigned to you by a teacher/professor in a class?

If so, what is the name of the class?
 
Thread 'Video on imaginary numbers and some queries'
Hi, I was watching the following video. I found some points confusing. Could you please help me to understand the gaps? Thanks, in advance! Question 1: Around 4:22, the video says the following. So for those mathematicians, negative numbers didn't exist. You could subtract, that is find the difference between two positive quantities, but you couldn't have a negative answer or negative coefficients. Mathematicians were so averse to negative numbers that there was no single quadratic...
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. In Dirac’s Principles of Quantum Mechanics published in 1930 he introduced a “convenient notation” he referred to as a “delta function” which he treated as a continuum analog to the discrete Kronecker delta. The Kronecker delta is simply the indexed components of the identity operator in matrix algebra Source: https://www.physicsforums.com/insights/what-exactly-is-diracs-delta-function/ by...
Thread 'Unit Circle Double Angle Derivations'
Here I made a terrible mistake of assuming this to be an equilateral triangle and set 2sinx=1 => x=pi/6. Although this did derive the double angle formulas it also led into a terrible mess trying to find all the combinations of sides. I must have been tired and just assumed 6x=180 and 2sinx=1. By that time, I was so mindset that I nearly scolded a person for even saying 90-x. I wonder if this is a case of biased observation that seeks to dis credit me like Jesus of Nazareth since in reality...

Similar threads

Replies
10
Views
1K
Replies
1
Views
1K
Replies
19
Views
3K
Replies
12
Views
178
Replies
2
Views
1K
Replies
2
Views
1K
Replies
5
Views
1K
Replies
1
Views
1K
Back
Top