All the following are properties of natural number N, for a and b belonging to N, except*1 pointa*ba + ba < ba - b

The statement "a*ba + ba < ba - b" is not a property of natural numbers.

Here's why:

Step 1: Understand the statement The statement is saying that for any two natural numbers a and b, the sum of a*ba and ba is less than the difference of ba and b.

Step 2: Test the statement with an example Let's take a = 2 and b = 3. According to the statement, 2*23 + 23 should be less than 23 - 3.

Step 3: Calculate 2*23 + 23 = 46 + 23 = 69 23 - 3 = 20

Step 4: Compare 69 is not less than 20.

Therefore, the statement "a*ba + ba < ba - b" is not a property of natural numbers.