• 這不是絕對的。有的積分是發散的,有時是收斂的,看衰減速度了。你說的無窮個數 -還是沒筆名- ♂ (176 bytes) () 12/21/2012 postreply 18:22:59
• 一尺之棰,日截其半,萬世不竭 -精靈寶鑽- ♂ (0 bytes) () 12/23/2012 postreply 23:12:11
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