SAT Subject Test™: Math Level 2 Crash Course Book + Online by Hardman Linda;Ogozalek Virginia;Licari Meredith;

SAT Subject Test™: Math Level 2 Crash Course Book + Online by Hardman Linda;Ogozalek Virginia;Licari Meredith;

Author:Hardman, Linda;Ogozalek, Virginia;Licari, Meredith;
Language: eng
Format: epub
Publisher: Research & Education Association
Published: 2013-08-15T00:00:00+00:00


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Note that there is a break in the graph at x = 0, because that value is excluded from the domain of the function because it would cause division by zero. The line x = 0 is called a vertical asymptote because the graph of the function approaches but never touches it.

2.A rational function can also have point discontinuity. The following graph shows the rational function .

Note that the graph of this rational function is a line. This is because when the numerator is factored as (x + 2)(x + 1), the rational expression can be simplified as x + 2, and the graph of the function is the line y = x + 2 with one important difference: the value that would cause a denominator of zero is excluded from the domain. Since this value is x = –1, the graph of has a hole at x = –1.



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