(a) Show that the function
g(x) = (3 + sin (1/x-2)/ (1 + x^2)
is bounded. This means to find real numbers m, M E R such that m ≤ g(x) ≤ M for
all x E R (and to show that these inequalities are satisfied!).
(b) Explain why the function
f(x) = { [x-2] [3 + sin (1/x-2)/ (1 + x^2)] if x ≠ 2,
{0, if x = 2
is continuous at all x ≠ 2
(c) Show that the function f(x) in Part (b) is continuous at x = 2. [Hint: Use
Part (a) and the Squeeze Theorem.]
1
Expert's answer
2012-09-25T09:43:16-0400
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