Maths problem, how to do, thanks?
回答 (1)
2020-08-22 9:41 am
✔ 最佳答案
y prop. to z/x^2, 意思是 y = kz/x^2 for some constant k.
7.5 = k (10)/(2^2) = 2.5k
∴ k = 3,
y = 3z/x^2
z = 50, x = 5, 則 y = 3(50)/(5^2) = 6
收錄日期: 2021-04-24 07:57:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20200821222715AAIxM1U