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  1. Home
  2. 12th grade
  3. Algebra I
  4. Exercise : Find the contrapositive of a statement

Find the contrapositive of a statement Algebra I

Find the contrapositive of the following statement.

"If it is raining, then the soil is wet."

Given a conditional statement P\Rightarrow Q, the contrapositive is \sim Q \Rightarrow \sim P .

The given statement is:

"If it is raining, then the soil is wet."

Therefore the contrapositive is:

"If the soil is not wet, then it is not raining."

The contrapositive of this statement is: "If the soil is not wet, then it is not raining."

"If it's Sunday, then we don't work."

Given a conditional statement P\Rightarrow Q, the contrapositive is \sim Q \Rightarrow \sim P .

The given statement is:

"If it's Sunday, then we don't work."

Therefore the contrapositive is:

"If we work, then it's not Sunday."

The contrapositive of the statement is: "If we work, then it's not Sunday."

"If a number is not divisible by any other prime, then it is said to be a prime number."

Given a conditional statement P\Rightarrow Q, the contrapositive is \sim Q \Rightarrow \sim P .

The given statement is:

"If a number is not divisible by any other prime, then it is said to be a prime number."

Therefore the contrapositive is:

"If a number is not prime, then it divisible by a prime number."

The contrapositive of the statement is: "If a number is not prime, then it divisible by a prime number."

"If a number is divisible by 2, then it is even."

Given a conditional statement P\Rightarrow Q, the contrapositive is \sim Q \Rightarrow \sim P .

The given statement is:

"If a number is not divisible by any other prime, then it is said to be a prime number."

Therefore the contrapositive is:

"If a number is not prime, then it divisible by a prime number."

The contrapositive of the statement is: "If a number is not even, then it not divisible by 2".

"If a number is non-negative and non-positive, then it must be 0."

Given a conditional statement P\Rightarrow Q, the contrapositive is \sim Q \Rightarrow \sim P .

The given statement is:

"If a number is non-negative and non-positive, then it must be 0."

Therefore the contrapositive is:

"If a number is not zero, then it positive or negative."

The contrapositive of the statement is: "If a number is not zero, then it is positive or negative."

"If a positive number squared it is equal to itself, then the number must be 1."

Given a conditional statement P\Rightarrow Q, the contrapositive is \sim Q \Rightarrow \sim P .

The given statement is:

"Assume we have a positive number. If the number squared it is equal to itself, then the number must be 1."

Therefore the contrapositive is:

"Assuming we start with a positive number: If the number is not 1, then its square is not equal to itself."

The contrapositive of the statement is: "Assuming we start with a positive number: If the number is not 1, then its square is not equal to itself."

" If the determinant of a matrix is not zero, then it is invertible."

Given a conditional statement P\Rightarrow Q, the contrapositive is \sim Q \Rightarrow \sim P .

The given statement is:

"If the determinant of a matrix is non zero, then it is invertible."

Therefore the contrapositive is:

"If a matrix is not invertible, then its determinant is 0."

The contrapositive of the statement is: "If a matrix is not invertible, then its determinant is 0."

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See also
  • Course : Methods of reasoning and logic
  • Exercise : Identify hypotheses and conclusions
  • Exercise : Draw a truth table
  • Exercise : Find a counterexample to a statement
  • Exercise : Find the inverse of a statement
  • Exercise : Find the converse of a statement
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