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题库 / GMATLA-DS-32
If ~$(y+3)(y-1)–(y-2)(y-1)=r(y-1)$~, what is the value of ~$y$~?
(1) ~$r^{2}=25$~
(2) ~$r=5$~
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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题干中无法确定r=5，因为若y=1，r可取任意值。即便确定r=5，依然无法确定y值。
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