函數及其圖像
回答 (1)
2013-11-24 11:43 pm
✔ 最佳答案
y = -x² - kxy = -(x² + k + k²/4) + k²/4
y = k²/4 - (x+k/2)²
if max. y = 16 then k²/4 = 16
k² = (16)(4) = 64
k = ±8
收錄日期: 2021-04-27 20:42:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20131124000051KK00118