急問!!
maths 問題!!
請問identity係咪一定要係兩條式等於, 唔可以大過/細過?
example:
(x+1)^2 = x^2 + 2x +1
呢個一定係identity.
咁我想問呢個係咪呢??
x^2 + 1 >0
收錄日期: 2021-04-26 15:37:36
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080504000051KK01720