Mathematics 1 Deneme Sınavı Sorusu #1231295

Evaluate limx→2  (  x  / |x-2| ). 


-2

-∞

2

+∞

The limit does not exist. 


Yanıt Açıklaması:

Since the denominator of the expression at x = 2 is 0, we must look at the one-sided limits in order to find the limit at x = 2 if it exists. Then we have,

limx→2+  (  x  / |x-2| ) =  limx→2+  (  2  / 0+ ) = +

limx→2-  (  x  / |x-2| ) =  limx→2-  (  2  / 0+ ) = +∞

Hence, since the one-sided limits show the same behavior at x = 2, the limit exist at x =2, and it is +∞.  

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