Discrete Math

[kiddopop]

The problem is:

Prove using the contrapositive approach: If x is positive tthen so is x + 1.

I just don't know how or where to start.

 

[PAULK]

The problem is:

Prove using the contrapositive approach: If x is positive tthen so is x + 1.

I just don't know how or where to start.

You start by assuming the conclusion is false, as in:

IT IS FALSE THAT x + 1 is positive.

Draw some conclusion that contradicts a known fact.

Write NOT( x + 1 > 0), or x + 1 <= 0

Can you take it from there?