MR-693 / 1. problem

Which of the following sentences are statements?

a) *1+1 = 2*

b) the number *16* is an odd number

c) an even number can be written in the form *2n*, where *n* is a natural number

d) the solution of the equation *3x=18* is a natural number

e) *( a-b) ^{2 }≥ 0* for every rational

f)

g)

h)

a) 1+1=2

a) YES - TRUE

b) 16 is an odd number.

b) YES - TRUTH (16:2=8)

c) Even numbers can be written in the form of 2n, where n is a natural number

c) YES - TRUE

d) The solution of the equation *3x=18* is a natural number

d) YES - TRUE (3x6=18)

e) *(a-b) ^{2 }≥ 0* for every rational

e) YES - TRUE (The square of each number is positive)

f) *ab > 0* if *a* and *b* are of the same sign

f) YES - TRUE (+·+=+ and -·-=+)

g) *a ^{2 }> 0* if

g) YES - TRUE (The square of every number is positive)

h) *- a ^{2} < 0* ha

h) YES - TRUE (The square of every number is positive, and then it becomes negative by changing the sign of the number)