1.

\({\rm{f}}\left( {\rm{x}} \right) = \frac{{27\left( {{{\rm{x}}^{\frac{2}{3}}} - {\rm{x}}} \right)}}{4}\)How many solutions does the function f(x) = -1 have?

A. One
B. Two
C. Three
D. Four
Answer» B. Two


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