Is sqrt((x-3)^2) = 3 - x?
1) x is not equal to 3
2) -x|x| > 0
OA: b
1) x is not equal to 3
2) -x|x| > 0
OA: b
sqrt() function refers to the positive square rootgmatmachoman wrote:Is sqrt((x-3)^2) = 3 - x?
1) x is not equal to 3
2) -x|x| > 0
OA: b
sqrt((x-3)^2) = x-3 when x-3>0
sqrt((x-3)^2) = 3-x when 3-x >0
1.) x is not equal to 3 is not sufficient to answer Is sqrt((x-3)^2) = 3 - x
2) -x|x| > 0 => -x > 0 => x< 0
sufficient to prove that 3-x>0
and hence sqrt((x-3)^2) = 3-x
Sufficient
Hence B
