Jawabanmu

2014-09-10T17:09:01+07:00
2014-09-10T17:26:28+07:00
 \sqrt{ \frac{1}{3^{-2x+2}} } =81 \\ 
 81 = 3^{(4 .2)} \\ 
81 =3^8 \\  \\ 
2x-2=8 \\ 
2x = 8+2 \\ 
2x = 10 \\ 
x = 5

 \sqrt{ \frac{27}{3^{2x-1}=81}} \\ 81=3^4\\ \\ 
maka \\  \\ 
3^{4}*3^{2x-1}=81 \\ 
3^{5}-3^{2x}=81 \\ 
-2x+5 \\ 
x =  -\frac{5}{2} 

makasih yaaa, fan itu yg ke dua gk pake akar, tp gpp makasih banyak yaa
ok sama sama