Exercises 1—14, to establish a big- O relationship, find witnesses C and k such that | f ( x ) | ≤ C | g ( x ) | whenever x > k . Show that x log x is O ( x 2 ) but that x 2 is not O ( x log x ) .
Exercises 1—14, to establish a big- O relationship, find witnesses C and k such that | f ( x ) | ≤ C | g ( x ) | whenever x > k . Show that x log x is O ( x 2 ) but that x 2 is not O ( x log x ) .
Solution Summary: The author explains that the given function xmathrmlogx is Oleft, but it isn't a function.
In Exercises 25–30, give a formula for the extended function that iscontinuous at the indicated point.
In Exercises 6–10, let f(x) = cos x, g(x) = Vx+ 2, and
h(x) = 3x?. Write the given function as a composite of two or more
of f, g, and h. For example, cos 3x? is f(h(x)).
6. V cos x + 2
1. V3 cos?x + 2
8. 3 cos x + 6
). cos 27x*
10. cos V2 + 3x²,
4. Show that the function log(1+ x) lies between functions x -
and x
2
for all x > 0. (Hint:
2(1+ x)
Can you use the concept of monotonicity somehow to show this?)
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