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Sagot :

Answer:

The choice B.

[tex]f ^{ - 1} (x) = \frac{1}{3} {x}^{2} [/tex]

caylus

Answer: B

Step-by-step explanation:

[tex]f(x)=y=\sqrt{3x} \\\\x=\sqrt{3y} \ exchanging\ x\ and\ y\\\\Finding\ y\\\\x^2=3y\\\\f^{-1}(x)=y=\dfrac{x^2}{3}[/tex]

Answer B