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题库 / GMATAdvanced-DS-20
If n>4, what is the value of the integer n?
(1)~$\frac{n!}{(n-3)!}$~=~$\frac{3!n!}{4!(n-4)!}$~
(2)~$\frac{n!}{3!(n-3)!}$~+~$\frac{n!}{4!(n-4)!}$~=~$\frac{(n+1)!}{4!(n-3)!}$~
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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第二个通分到左右两边消不掉的时候就盲选了，感觉第二个不好算
有容易的算法吗，（2）？
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