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题库 / Prep2007E1-DS-97
Is ~$\sqrt{\left ( x-3 \right )^{2}}$~ = 3 - x ？
(1) ~$x\neq 3$~
(2) ~$-x\left | x \right |$~>0
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
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根号n结果只指正平方根
根号下面的数只要是非负数就行了，可以等于0
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