Express each of these system specifications using predicates, quantifiers, and logical connectives, if necessary. a) Every user has access to exactly one mailbox. b) There is a process that continues to run during all error conditions only if the kernel is working correctly. c) All users on the campus network can access all websites whose url has a.edu extension. *d) There are exactly systems that monitor every remote sewer.
Express each of these system specifications using predicates, quantifiers, and logical connectives, if necessary. a) Every user has access to exactly one mailbox. b) There is a process that continues to run during all error conditions only if the kernel is working correctly. c) All users on the campus network can access all websites whose url has a.edu extension. *d) There are exactly systems that monitor every remote sewer.
A function is defined on the interval (-π/2,π/2) by this multipart rule:
if -π/2 < x < 0
f(x) =
a
if x=0
31-tan x
+31-cot x
if 0 < x < π/2
Here, a and b are constants. Find a and b so that the function f(x) is continuous at x=0.
a=
b= 3
Use the definition of continuity and the properties of limits to show that the function is continuous at the given number a.
f(x) = (x + 4x4) 5,
a = -1
lim f(x)
X--1
=
lim
x+4x
X--1
lim
X-1
4
x+4x
5
))"
5
))
by the power law
by the sum law
lim (x) + lim
X--1
4
4x
X-1
-(0,00+(
Find f(-1).
f(-1)=243
lim (x) +
-1 +4
35
4 ([
)
lim (x4)
5
x-1
Thus, by the definition of continuity, f is continuous at a = -1.
by the multiple constant law
by the direct substitution property
Chapter 1 Solutions
Discrete Mathematics and Its Applications ( 8th International Edition ) ISBN:9781260091991
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