Jawapan

2016-05-01T19:45:56+08:00
M = (2 + k)/(1 - k)
M - kM = 2 + k
-kM - k = 2 - M
k(-M - 1) = 2 - M
k = (2 - M)/(-M - 1)
2016-05-01T19:46:34+08:00
M = 2 + k / 1 - k
m ( 1 - k) = 2 + k
m ( 1 - k) - k = 2
m - mk - k = 2
- mk - k = 2 - m
k (-m - 1) = 2 - m
k = 2-m/(-m -1)