GMAT 考满分题库

Both and are positive integers. Is $$(a^{-1}+b^{-1})^{-1}$$ < $$(a^{-1}b^{-1})^{-1}$$?

1:a > b

2:b > $$\frac{1}{2}$$
  • AStatement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
  • BStatement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
  • CBoth statements TOGETHER are sufficient, but NEITHER one ALONE is sufficient.
  • DEACH statement ALONE is sufficient.
  • EStatements (1) and (2) TOGETHER are NOT sufficient.
显示答案
正确答案: C

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