[中學] 比大小

[opagainop (12345)]

A = (1/2)(3/4)(5/6)(7/8)........(99/100)

B = (2/3)(4/5)(6/7)(8/9)........(100/101)

C = 1/10

D = 1/11

試求 A,C (比大小)
     B,D (比大小)

感謝各位高手解題  ^^

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→ nonumber    : A<B 1/121<AB=1/101<1/100 A<1/10 1/11<B
→ opagainop   : 謝謝