a) \(\frac{9-3x}{7+2x}\)
b) \(\frac{7x-9}{2x+3}\)
c) \(\frac{2x-7}{3x+9}\)
d) \(\frac{2x-3}{7x+9}\)
Let the function f be defined by f(x)=\(\frac{9+3x}{7-2x}\), then f-1(x) is ______
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Let the function f be defined by f(x)=\(\frac{9+3x}{7-2x}\), then f-1(x) is ______
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