Finding $g(x)$ for $x\in R \,\, and \,\, x\neq \pm 1$

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  • Thread starter Albert1
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In summary, the purpose of finding g(x) for x ∈ R and x ≠ ±1 is to determine the value of the function at any point on the real number line, except for x = ±1. To calculate g(x), we use the formula (x²-1)/(x-1), which is derived from the definition of g(x) as the limit of (f(x)-f(1))/(x-1) as x approaches 1. The possible values of g(x) are all real numbers, except for when x = ±1. The function can be graphed for x ∈ R and x ≠ ±1, but has a break at x = 1. For values of x close to ±1,
  • #1
Albert1
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$x\in R \,\, and \,\, x\neq \pm 1$

$if$: $g(\dfrac {x-3}{x+1})+g(\dfrac {3+x}{1-x})=x$

$find$: $g(x)$
 
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  • #2
Albert said:
$x\in R \,\, and \,\, x\neq \pm 1$

$if$: $g(\dfrac {x-3}{x+1})+g(\dfrac {3+x}{1-x})=x$

$find$: $g(x)$
hint:
let $g(\dfrac{x-3}{x+1})=a,g(\dfrac{x+3}{1-x})=b,g(x)=c$
find :$a,b,c$
so how to create 3 "Linear equations",and from them to get the solutions of $a,b,c$
 
  • #3
Albert said:
hint:
let $g(\dfrac{x-3}{x+1})=a,g(\dfrac{x+3}{1-x})=b,g(x)=c$
find :$a,b,c$
so how to create 3 "Linear equations",and from them to get the solutions of $a,b,c$
more hint :
$a+b=x---(1)$
$b+c=\dfrac {x-3}{x+1}---(2)$
$a+c=\dfrac {x+3}{1-x}---(3)$
$(1)(2)(3)$ why ?
find $c$ expressing in $x$
 

FAQ: Finding $g(x)$ for $x\in R \,\, and \,\, x\neq \pm 1$

What is the purpose of finding g(x) for x ∈ R and x ≠ ±1?

The purpose of finding g(x) for x ∈ R and x ≠ ±1 is to determine the value of the function g(x) at any point on the real number line, except for x = ±1. This can help us understand the behavior of the function and make predictions about its values.

How is g(x) calculated for x ∈ R and x ≠ ±1?

To calculate g(x) for x ∈ R and x ≠ ±1, we use the formula g(x) = (x²-1)/(x-1). This formula is derived from the definition of g(x) as the limit of (f(x)-f(1))/(x-1) as x approaches 1, where f(x) = x². By plugging in x ≠ ±1, we can find the value of g(x) at any point on the real number line.

What are the possible values of g(x) for x ∈ R and x ≠ ±1?

The possible values of g(x) for x ∈ R and x ≠ ±1 are all real numbers, except for when x = ±1. This is because the function g(x) is defined as the limit of (f(x)-f(1))/(x-1) as x approaches 1, where f(x) = x². As long as x is not equal to ±1, the limit exists and the value of g(x) is a real number.

Can g(x) be graphed for x ∈ R and x ≠ ±1?

Yes, g(x) can be graphed for x ∈ R and x ≠ ±1. The graph of g(x) looks like a straight line with a break at x = 1, because the value of g(x) is undefined at this point. However, the graph is continuous and smooth for all other values of x.

How does g(x) behave for values of x close to ±1?

For values of x close to ±1, g(x) behaves asymptotically. This means that as x approaches ±1, the value of g(x) approaches ±∞. This is because the denominator (x-1) approaches 0, causing the function to have a vertical asymptote at x = 1. This behavior is important to consider when analyzing the function and making predictions about its values.

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