Which of the following statements are correct? Choose all that apply. a. \lim _{x \rightarrow 1^{+}} \frac{1}{1-x}lim
x→1
+
1−x
1
does not exist. b. \lim _{x \rightarrow 1^{+}} \frac{1}{1-x}=\inftylim
x→1
+
1−x
1
=[infinity]. c. \lim _{x \rightarrow 1^{+}} \frac{1}{1-x}=-\inftylim
x→1
+
1−x
1
=−[infinity]
