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3. f−1(x)=12x+32f(f−1(x))=f(12x+32)=2 (12x+32)−3=x+3−3=x
7. (2, ∞)
9. x=2, y=3
11. x=2, y=2− log 2
15. A−1=[ 215232 ]
17. 1,−1, 126,−126
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