Calculate the moments Mx, My and the center of mass

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Homework Help Overview

The discussion revolves around finding the equations of lines in a coordinate system, specifically focusing on a problem involving the point (4, 3) and the relationship between two functions, f(x) and g(x).

Discussion Character

  • Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants are attempting to determine the correct equation for g(x) based on the given point and the slope derived from the coordinates. There is confusion regarding the definition and representation of f(x) and g(x), leading to questions about their relationships.

Discussion Status

Some participants have provided insights into the slope of the line and its equation, while others are clarifying the definitions of the functions involved. There is an ongoing exploration of the mathematical relationships without a clear consensus on the final form of the equations.

Contextual Notes

There is a noted emphasis on the accuracy of mathematical expressions, with participants pointing out the need for proper equation formatting. The discussion is constrained by the specific point provided and the interpretations of the functions involved.

huybinhs
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Homework Statement



2010-10-20_2217.png



2. The attempt at a solution

I'm working on #49 ONLY.

I know the top line equation is f(x) = x

but I need to find the g(x), so how can I find with the point is given (4,3). Please help!
 
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huybinhs said:

Homework Statement



2010-10-20_2217.png



2. The attempt at a solution

I'm working on #49 ONLY.

I know the top line equation is f(x) = x
No, it isn't. How could it be, if it goes through (4, 3)?
huybinhs said:
but I need to find the g(x), so how can I find with the point is given (4,3). Please help!
What is g(x) supposed to represent? I am assuming that what you are calling f(x) is the line through (0, 0) and (4, 3).
 
Mark44 said:
No, it isn't. How could it be, if it goes through (4, 3)?
What is g(x) supposed to represent? I am assuming that what you are calling f(x) is the line through (0, 0) and (4, 3).

I got it! It is the slope of the line = 3/4, so the equation line is 3x/4 ;)
 
Technical point: The equation of the line is y = 3x/4. 3x/4 is not an equation (there's no = .)
 
hehe, "what you can't ignore.." http://bayarearoster.com/js/includes/34/b/happy.gif
 
Mark44 said:
Technical point: The equation of the line is y = 3x/4. 3x/4 is not an equation (there's no = .)

Gooooooooooot it ;)
 
Incognition said:
hehe, "what you can't ignore.." http://bayarearoster.com/js/includes/34/b/happy.gif

Agree ;)
 

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