maths
2009-12-20 12:07 am
1. If the difference of two numbers is 14,find the minimum value of the product of these two numbers.
回答 (4)
2009-12-20 2:15 am
✔ 最佳答案
If the difference of two numbers is 14,find the minimum value of theproduct of these two numbers.
Sol
x(x－14)
=x^2－14x
=x^2－14x+49－49
=(x－7)^2－49
(x－7)^2>=0
(x－7)^2－49>=－49
x(x－14)>=－49
min=－49
2009-12-20 1:08 am
If negative numbers are allowed, the minimum product is
-7 x 7 = -49
If only positive numbers are allowed, the minumum product is
0 x 14 = 0
-7 x 7 = -49
If only positive numbers are allowed, the minumum product is
0 x 14 = 0
參考: myself
2009-12-20 12:21 am
how to calculate?
2009-12-19 17:10:48 補充：
it is wrong..
2009-12-19 17:10:48 補充：
it is wrong..
2009-12-20 12:09 am
Including negative number?
2009-12-19 17:16:56 補充：
To auts123:
0 is not a positive number.
2009-12-19 17:16:56 補充：
To auts123:
0 is not a positive number.
收錄日期: 2021-04-28 14:13:42
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091219000051KK00724