In: Advanced Math
1) Suppose that a function f(x) is defined for all real values of x, except x = xo. Can anything be said about lim x → x 0 f ( x ) ?
Give reasons for your answer.
2) If x4 ≤ f(x) ≤
x2 for x in [-1,1] and
x2 ≤ f(x) ≤
x4 for x < -1 and x >
1, at what points c do you automatically know lim x → c f
( x ) ? What can you say about the value of the limits at these
points (x = +/-1) and at x = 0?
3)
Explain why the following statement is true or
false:
If g is continuous and increasing on its entire domain,
then g(x2) >
g(x1) when x1 <
x2