MHB Solve the inequality and graph the solution on a real number line

AI Thread Summary
To solve the inequality (3x - 5)/(x - 5) > 4, first subtract 4 from both sides to obtain (3x - 5)/(x - 5) - 4 > 0. Next, combine the terms on the left side to create a single fraction. Identify critical points where the numerator and denominator equal zero, as these will help determine the intervals for testing the inequality. Finally, graph the solution on a real number line, marking the critical points and indicating where the inequality holds true.
megacat8921
Messages
8
Reaction score
0
(3x - 5)/(x - 5) > 4

How does one complete this problem?
 
Mathematics news on Phys.org
We are given to solve:

$$\frac{3x-5}{x-5}>4$$

Now, one might be tempted to multiply through by $x-5$ to clear the denominator on the right side, as we would with an equation. But with inequalities, we have to be mindful of the sign of a multiplicative quantity, so our best strategy here is to subtract 4 from both sides:

$$\frac{3x-5}{x-5}-4>0$$

Now, you need to combine terms on the left, and then determine your critical numbers, which are found anywhere the numerator AND denominator is zero. Can you proceed?
 
Yes, thank you.
 
Suppose ,instead of the usual x,y coordinate system with an I basis vector along the x -axis and a corresponding j basis vector along the y-axis we instead have a different pair of basis vectors ,call them e and f along their respective axes. I have seen that this is an important subject in maths My question is what physical applications does such a model apply to? I am asking here because I have devoted quite a lot of time in the past to understanding convectors and the dual...
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...
Back
Top