R be the relation on the set of people with doctorates such that ( a , b ) ∈ R if and only if a was the thesis advisor of b . When is an ordered pair ( a , b ) in R 2 ? When is an ordered pair ( a , b ) in R n , when n is a positive integer? (Assume that every person with a doctorate has a thesis advisor.)
R be the relation on the set of people with doctorates such that ( a , b ) ∈ R if and only if a was the thesis advisor of b . When is an ordered pair ( a , b ) in R 2 ? When is an ordered pair ( a , b ) in R n , when n is a positive integer? (Assume that every person with a doctorate has a thesis advisor.)
Solution Summary: The author explains how to find the ordered pairs (a,b) in a positive integer.
Rbe the relation on the set of people with doctorates such that
(
a
,
b
)
∈
R
if and only ifawas the thesis advisor ofb. When is an ordered pair
(
a
,
b
)
in
R
2
? When is an ordered pair
(
a
,
b
)
in
R
n
, when n is a positive integer? (Assume that every person with a doctorate has a thesis advisor.)
1.
Prove the following arguments using the rules of inference. Do not make use of
conditional proof.
(а) а → (ЪЛс)
¬C
..¬a
(b) (pVq) →
→r
יור
(c) (c^h) → j
¬j
h
(d) s→ d
t
d
-d
..8A-t
(e) (pVg) (rv¬s)
Лѕ
קר .'
The graph of f(x) is given below. Select each true statement about the continuity of f(x) at x = 1.
Select all that apply:
☐ f(x) is not continuous at x = 1 because it is not defined at x = 1.
☐ f(x) is not continuous at x = 1 because lim f(x) does not exist.
x+1
☐ f(x) is not continuous at x = 1 because lim f(x) ‡ f(1).
x+→1
☐ f(x) is continuous at x = 1.
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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