H + K = 999 , K - H = 555 , 那麼 H = ( ? )
回答 (13)
2007-03-17 12:46 am
✔ 最佳答案
H + K = 999......(1)K - H = 555
K = H + 555......(2)
Sub (2) into (1)
H + H + 555 = 999
2H = 444
H = 222
參考: chai716
2007-03-18 4:49 pm
聯立分程：
{H+K=999.........(1)
{K-H=555..........(2)
(1).....K+H=999
(2).....K-H=555
(1)+(2)2K=1554
K=777
把K=777代入方程(1)，
777+H=999
H=222
{H+K=999.........(1)
{K-H=555..........(2)
(1).....K+H=999
(2).....K-H=555
(1)+(2)2K=1554
K=777
把K=777代入方程(1)，
777+H=999
H=222
2007-03-18 2:49 am
H=222
2007-03-17 6:20 pm
這是和差問題:
H+K=999
K+H=999 ...1
K-H=555 ...2
1-2:
K-K+H-(-H)=999-555
H+H=444
2H=444
H=222, K=777
H+K=999
K+H=999 ...1
K-H=555 ...2
1-2:
K-K+H-(-H)=999-555
H+H=444
2H=444
H=222, K=777
2007-03-17 3:41 am
H + K = 999
soH=999- K
K - H = 555
K -(999- K)= 555
K -999+ K= 555
2K= 555+999
2K=1554
K=1554/2
K=777
那麼H= 999 -K
=999-777
=222
soH=999- K
K - H = 555
K -(999- K)= 555
K -999+ K= 555
2K= 555+999
2K=1554
K=1554/2
K=777
那麼H= 999 -K
=999-777
=222
2007-03-17 2:22 am
222!!!!!!!!!!!!!
2007-03-17 2:21 am
h+k=999 k-h=555 k=777 h=222
2007-03-17 1:12 am
H + K = 999---------(1)
K - H = 555
-H +K = 555------(2)
(1)-(2) 2H =444
H =222-----(3)
Sub into (1), 222 + K = 999
K = 777
K - H = 555
-H +K = 555------(2)
(1)-(2) 2H =444
H =222-----(3)
Sub into (1), 222 + K = 999
K = 777
參考: me
2007-03-17 1:11 am
222!!!!!!!!!!!!!
2007-03-17 12:47 am
用2元1次聯立分程：
{H+K=999.........(1)
{K-H=555..........(2)
(1).....K+H=999
(2).....K-H=555
---------------------
(1)+(2)2K=1554
K=777
把K=777代入方程(1)，
777+H=999
H=222
{H+K=999.........(1)
{K-H=555..........(2)
(1).....K+H=999
(2).....K-H=555
---------------------
(1)+(2)2K=1554
K=777
把K=777代入方程(1)，
777+H=999
H=222
參考: 自己@
2007-03-17 12:46 am
999>H>555
H
H
H=222
K=777
H
H
H=222
K=777
2007-03-17 12:42 am
H=222
收錄日期: 2021-05-03 12:33:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070316000051KK02117