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Discussion Response Post to:
LIMITS
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![[Post New]](/templates/default/images/icon_minipost_new.gif) 10 Jun 2007 00:19:36 IST
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LIMITS  Properties of Limits If b and c are real numbers, n is a positive integer, and the functions ? and g have limits as  , then the following properties are true. | 1. Scalar multiple: | [b(?(x))] = b[ ?(x)] | | 2. Sum or difference: | [?(x) g(x)] = ?(x) g(x) | | 3. Product: | [?(x)g(x)] = [ ?(x)][ g(x)] | | 4. Quotient: | [?(x)/g(x)] = [ ?(x)]/[ g(x)], if g(x) 0 | One-Sided Limits ?(x) | x approaches c from the right | ?(x) | x approaches c from the left | Limits at Infinity ?(x) = L | or | ?(x) = L | The value of ?( x) approaches L as x increases/decreases without bound. y = L is the horizontal asymptote of the graph of ?. Some Nonexistent Limits Some Infinite Limits | Exercise: | What is ? | | (A) 1 | | (B) 0 | | (C) | | (D) | | (E) The limit does not exist. /TD> | | | | The answer is A. | You should memorize this limit. | Continuity Definition A function ? is continuous at c if: 1. ?( c) is defined 2.  ?( x) exists 3.  ?( x) = ?( c) Graphically, the function is continuous at c if a pencil can be moved along the graph of ?( x) through ( c, ?( c)) without lifting it off the graph. |
     
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simpler@INDIAN |
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