answersLogoWhite

0


Best Answer

Yes, contrapositives are always true, as long as the original statement stood true.

User Avatar

Wiki User

12y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: Are contrapositives true
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Math & Arithmetic

What is a contrapositive in math?

Contrapositives are an idea in logic which is very useful in math.We say that A implies B if whenever Statement A is true then we know that statement B is also true.So, Say that A implies B, written:A -> BThe contrapositive of this statement is:Not-B -> Not-ARemember "A implies B" means that B must be true if A is true, so if we know that B is falce, we can deduce that A couldn't be true, so it must be falce.With truth tables it can easily be shown that"A -> B" IF AND ONLY IF "Not-B -> Not-A"So when using the contrapositive, no information is lost.In math, this is often used in proofs when, while trying to demonstrate that A implies B, it is easier to show that Not-B implies Not-A and hence that A implies B.


True or false Postulates are accepted as true without proof.?

True


True or false A corollary is a statement that can be easily proved using a theorem?

For Apex the answer is “True“.


How do you construct a truth table for parenthesis not p q parenthesis if and only if p?

Assuming that you mean not (p or q) if and only if P ~(PVQ)--> P so now construct a truth table, (just place it vertical since i cannot place it vertical through here.) P True True False False Q True False True False (PVQ) True True True False ~(PVQ) False False False True ~(PVQ)-->P True True True False if it's ~(P^Q) -->P then it's, P True True False False Q True False True False (P^Q) True False False False ~(P^Q) False True True True ~(P^Q)-->P True True False False


Is nelfi true?

true

Related questions

What part of speech is the word contrapositive?

The word contrapositive is a noun. The plural noun is contrapositives.


What does a neutral charge have?

It depends. Neutral atoms have numerous types and classifications. There are happy, sad, angry, and indifferent atoms in the neutral group. Also, isotonic and philanthropic atoms will always have positive charges. The contrapositives and monolithics always are negative.


What is a contrapositive in math?

Contrapositives are an idea in logic which is very useful in math.We say that A implies B if whenever Statement A is true then we know that statement B is also true.So, Say that A implies B, written:A -> BThe contrapositive of this statement is:Not-B -> Not-ARemember "A implies B" means that B must be true if A is true, so if we know that B is falce, we can deduce that A couldn't be true, so it must be falce.With truth tables it can easily be shown that"A -> B" IF AND ONLY IF "Not-B -> Not-A"So when using the contrapositive, no information is lost.In math, this is often used in proofs when, while trying to demonstrate that A implies B, it is easier to show that Not-B implies Not-A and hence that A implies B.


MS Office is hardware true or false?

False. It is software.


Is it true or false that significant books about an event won't be published until a year or more after the event?

True because just like what happens at the twin towers there was a big book about it made by time magazine but that book was not made until years after the event


All rectangles are quadrilaterals true or false?

true


Is it true or false all integers are rational numbers?

It is true.


Is it true or false that if you create logical subdirectories you can more easily locate individual files?

true


What is the result of True AND False OR True?

True AND False OR True evaluates to True. IT seems like it does not matter which is evaluated first as: (True AND False) OR True = False OR True = True True AND (False OR True) = True AND True = True But, it does matter as with False AND False OR True: (False AND False) OR True = False OR True = True False AND (False OR True) = False AND True = False and True OR False AND False: (True OR False) AND False = True AND False = False True OR (False AND False) = True OR False = True Evaluated left to right gives a different answer if the operators are reversed (as can be seen above), so AND and OR need an order of evaluation. AND can be replaced by multiply, OR by add, and BODMAS says multiply is evaluated before add; thus AND should be evaluated before OR - the C programming language follows this convention. This makes the original question: True AND False OR True = (True AND False) OR True = False OR True = True


True or false The county clerk is in charge of all county records.?

true


True or false vehicle size and shape are major factors in the operational success of the system?

True


True or false Postulates are accepted as true without proof.?

True