Jawabanmu

2014-09-08T16:50:53+07:00
3.  27^{1/2(2x-1)}= 243^{- 3x . 1/3}  => 3.  3^{3(x-1/2)}= 3^{- 5x}

=3^{1+3(x-1/2)}= ^{- 5x}--> 1+3(x-1/2)= -5x --> 1+3x-3/2+5x=0


8x=5/2---x =5/16

 9^{x-2}= 3^{- x^{2} +4x-1}  -->  3^{2x-4}= 3^{- x^{2} +4x-1}


2x-4=-x²+4x-1------ x²-2x-3=0...(x-3)(x+1)........ x=3  dan x=-1