Question

a) a+x=a

b) a+x>a

c)a+x<a

Answer 1

x={0}

x=N*

x=0

Answer 2

a+x=a

=>x=0

a+x>a

=>x>0

a+x<a

=>x<0

Answer 3

Ta có

a) x = {0}

b) x = N*

c) x = \(\theta\)

nha bn