SOLUTION: Sketch the graph of f(x)= (3(x^2-4))/(x^2-1) give the x and y intercepts and the horizontal and vertical asymptotes

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Question 748183: Sketch the graph of f(x)= (3(x^2-4))/(x^2-1) give the x and y intercepts and the horizontal and vertical asymptotes
Found 2 solutions by lynnlo, ikleyn:
Answer by lynnlo(4176) About Me  (Show Source):
Answer by ikleyn(53430) About Me  (Show Source):
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Sketch the graph of f(x)= (3(x^2-4))/(x^2-1) give the x and y intercepts
and the horizontal and vertical asymptotes
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You get vertical asymptotes by equating the denominator to zero

    x^2 - 1 = 0.


From this equation, you find its roots  x = 1 and -1.

The equations of asymptotes are  x = 1  and  x = -1.



You get x- intercepts by equating the numerator to zero

    x^2 - 4 = 0.


From this equation, you find its roots  x = 2 and -2.

Thus, x-intercepts are  x = 2  and  x = -2.



You find y-intercept by taking x = 0 in the formula for the function, so, y-intercept is

    y = %283%2A%280-4%29%29%2F%280-1%29 = %28-12%29%2F%28-1%29 = 12.

Solved. All questions are answered.

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https://www.desmos.com/calculator/

Print there the function formula and get the plot instantly.