September 2018 1 17 Report
Himpunan penyelesaian persamaan 2.  3^{x+1} -  9^{x} + 27 = 0 adalah...
A. { 1, 2 }
B. { -1, 2 }
C. { 1 }
D. { 2 }
E. { -2 }

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