a-maths~~~~~~~~
回答 (2)
2007-10-11 6:19 am
參考: My Maths knowledge
2007-10-10 7:36 am
ay² + by + c = 0
bx² + cx + a = 0 ------------- (1)
y = 3x
a(3x)² + b(3x) + c = 0
9ax² + 3bx + c = 0 同 (1) 相比
條件 : 9a/b = 3b/c = c/a
bx² + cx + a = 0 ------------- (1)
y = 3x
a(3x)² + b(3x) + c = 0
9ax² + 3bx + c = 0 同 (1) 相比
條件 : 9a/b = 3b/c = c/a
收錄日期: 2021-04-23 20:41:40
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071009000051KK04777