Jawabanmu

2014-04-04T08:53:41+07:00
Diketahui :
- n = 2
- L = 1,5 m

L = 3/4 λ . (2 n - 1)
L = 3/4 λ . (2 .2 - 1)
L = 3/4 λ . 3
L/ 3/4 = λ . 3
4/3 L = λ . 3
λ = 4/3 L .3 
λ = 4 L
λ = 4 . 1,5 m 
λ = 6 m 
(maaf kalau salah)