If a + 2B + 3C + 4 = 0, find 3 ^ A / 9 ^ - B × 27 ^ C
3^a/9^-b×27^c
=3^a×9^b×3^(3c)
=3^(a+2b+3c)
∵a+2b+3c+4=0
∴a+2b+3c=-4
simple form
=3^(-4)
=1/81
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