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3^(2x^2-10x+14) <= 3^(3x+3)
2x^2-10x+14 <= 3x+3
2x^2-13x+11 <= 0
(2x-11)(x-1)<=0
1<x<11/2
3^2(x²-5x+7) ≤ 3^3(x+1)
2(x² -5x + 7) ≤ 3(x+1)
2x² -10 x + 14 - 3x - 3 ≤ 0
2x²-13x + 11 ≤ 0
(2x - 11)(x - 1) ≤ 0
x ≤ 11/2 atau x ≥ 1
atau
1 ≤ x ≤ 11/2