If |3x-2|+|3x-4|+|3x-6|`ge`12, then which of the following is/are incorrect -

If -3x+6ge18 , which of the following must be true?

For the function f(x) = 2 x ^(3) - 3x ^(2) - 12 x + 4 which of the following statement is correct

If f(x) = {{:(2a-x, "for",-a lt x lt a),(3x-2a ,"for", x ge a):} , then which one of the following is true?

For the function f(x)= {{:(,|x-3|,x ge 1),(,(x^(2))/(4)-(3x)/(2)+(13)/(4),x lt 1):} which one of the folllowing is incorrect

For the function f(x)= {{:(,|x-3|,x ge 1),(,(x^(2))/(4)-(3x)/(2)+(13)/(4),x lt 1):} which one of the folllowing is incorrect