d the error in the “proof” of the following “theorem.” “Theorem”: Let R be a relation on a set A that is symmetric and transitive. Then R is reflexive. Proof: Let a ∈ A . Take an element b ∈ A such that ( a , b ) ∈ R . Because R is symmetric, we also have ( b , a ) ∈ R . Now using the transitive property, we can conclude that ( a , a ) ∈ R because ( a , b ) ∈ R and ( b , a ) ∈ R .
d the error in the “proof” of the following “theorem.” “Theorem”: Let R be a relation on a set A that is symmetric and transitive. Then R is reflexive. Proof: Let a ∈ A . Take an element b ∈ A such that ( a , b ) ∈ R . Because R is symmetric, we also have ( b , a ) ∈ R . Now using the transitive property, we can conclude that ( a , a ) ∈ R because ( a , b ) ∈ R and ( b , a ) ∈ R .
Solution Summary: The author explains that the error in the given proof a theorem is "Take an element bin A such that (a,b) in R.
d the error in the “proof” of the following “theorem.”
“Theorem”:LetRbe a relation on a setAthat is symmetric and transitive. ThenRis reflexive.
Proof:Let
a
∈
A
.Take an element
b
∈
A
such that
(
a
,
b
)
∈
R
.BecauseR issymmetric, we also have
(
b
,
a
)
∈
R
. Now using the transitive property, we can conclude that
(
a
,
a
)
∈
R
because
(
a
,
b
)
∈
R
and
(
b
,
a
)
∈
R
.
8. On what intervals, each function continuous?
(a) f(x) = 3x11 + 4x²+1
3x²+5x-1
(b) g(x) =
x²-4
X,
x < 1,
QTs the function f(x)
continuous at = 1? Use the definition of continuity to justify
review problem please help!
Sara (a 23 year old college graduate) is starting her first career. She met with a financial planner and has determined that she wants $1,000,000 when she retires at the age of 63. She has found an annuity that pays 4.25%, compounded quarterly.
What will she need to save each month, if Sara waits 20 years to start saving?
N:
P/Y:
I%:
C/Y:
PMT:
FV:
End or Begin
$4158.98
$4,115.26
$2645.83
$6,707.40
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.
RELATIONS-DOMAIN, RANGE AND CO-DOMAIN (RELATIONS AND FUNCTIONS CBSE/ ISC MATHS); Author: Neha Agrawal Mathematically Inclined;https://www.youtube.com/watch?v=u4IQh46VoU4;License: Standard YouTube License, CC-BY