Posted by **fatma** on Saturday, April 19, 2014 at 3:19am.

Let f x coth x . Use the Graph software posted in Moodle to do the following:

(a) Graph f x .

(b) Graph the tangent and normal lines to the graph of f x at x 1.

(c) Graph f x .

(d) From the graphs obtained in parts (a) – (c), answer the following questions

(i) lim

x

f x

(ii) lim

x

f x

(iii)

0

lim

x

f x

(iv)

0

lim

x

f x

(v) explain why f x is not differentiable at x 0

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