Converse,the contrapositive and the inverse of these condition

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SUMMARY

The discussion focuses on deriving the converse, contrapositive, and inverse of several conditional statements. For the statement "If it rains today, then I will drive to work," the converse is "If I drive to work, then it rains today," the contrapositive is "If I do not drive to work, then it does not rain today," and the inverse is "If it does not rain today, then I will not drive to work." The mathematical statement "If |x|=x, then x≥0" has the inverse "If |x|≠x, then x<0." The participants clarify these logical transformations, ensuring a comprehensive understanding of the concepts involved.

PREREQUISITES
  • Understanding of conditional statements in logic
  • Familiarity with mathematical notation and inequalities
  • Knowledge of logical equivalences (converse, contrapositive, inverse)
  • Basic algebraic concepts, particularly absolute values
NEXT STEPS
  • Study logical equivalences in depth, focusing on their applications in proofs
  • Explore the implications of conditional statements in mathematical reasoning
  • Learn about the use of absolute values in inequalities
  • Practice deriving converses, contrapositives, and inverses for various statements
USEFUL FOR

Students of mathematics, educators teaching logic and reasoning, and anyone interested in formal logic and its applications in proofs and problem-solving.

annie1
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q)give the converse ,the contrapositive and inverse of these conditional statements
a)if it rains today,then i will drive to work
b)if |x|=x then x>=0
c)if n is greater than 3,then n^2 is greater then 9
 
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Re: converse,the contrapositive and the inverse of these condition

annie said:
q)give the converse ,the contrapositive and inverse of these conditional statements
a)if it rains today,then i will drive to work
b)if |x|=x then x>=0
c)if n is greater than 3,then n^2 is greater then 9

If P then Q. What are the converse ,the contrapositive and inverse of that statement?
 
Re: converse,the contrapositive and the inverse of these condition

Plato said:
If P then Q. What are the converse ,the contrapositive and inverse of that statement?

converse q then p
contrapositive not q then not p
inverse not p then not p
i don't understand how to do b part
 
Re: converse,the contrapositive and the inverse of these condition

annie said:
converse q then p
contrapositive not q then not p
inverse not p then not q
i don't understand how to do b part

b) $$\text{If }|x|=x\text{ then }x\ge 0~.$$

Inverse: $$\text{If }|x|\ne x\text{ then }x< 0~.$$

Now you post the others.
 
Re: converse,the contrapositive and the inverse of these condition

Plato said:
b) $$\text{If }|x|=x\text{ then }x\ge 0~.$$

Inverse: $$\text{If }|x|\ne x\text{ then }x< 0~.$$

Now you post the others.

converse if x>=0 then |x|=x
contrapositive if x ne 0 then |x| ne x
 
Re: converse,the contrapositive and the inverse of these condition

annie said:
converse if x>=0 then |x|=x
contrapositive if x ne 0 then |x| ne x
NO!

$$\text{If }x<0\text{ then }|x|\ne x~.$$
 

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