Hãy chọn câu sai:

\(x < y\)                   

\(x = y\)            

\(x > y\)          

\(x \le y\)

\(a - b > 0\)                   

\(a - b < 0\)            

\(a - b = 0\)      

\(a - b \le 0\)

\(1\)    

\(2\)    

\(3\)    

\(0\)

\(2a + 2 > 2b + 4\)

\(2a + 2 < 2b + 4\)     

\(2a + 2 \ge 2b + 4\)

\(2a + 2 \le 2b + 4\)

\(\dfrac{{{a^2} + {b^2}}}{2} < ab\)

\(\dfrac{{{a^2} + {b^2}}}{2} \le ab\) 

\(\dfrac{{{a^2} + {b^2}}}{2} \ge ab\)

\(\dfrac{{{a^2} + {b^2}}}{2} > ab\)

\({\left( {x + y} \right)^2} \le 4xy\)                                               

\({\left( {x + y} \right)^2} > 4xy\)                                                

 \({\left( {x + y} \right)^2} < 4xy\)

\({\left( {x + y} \right)^2} \ge 4xy\)