Let F(x) = X ³ + 2x + 1 $( - \infty , \infty )$

question 22

Multiple Choice

Let f(x) = x ³ + 2x + 1, and assume that the domain of f ^-1 is $( - \infty , \infty )$ . Simplify $f \left[ f ^ { - 1 } ( t + 5 ) \right]$ .

• A) t ³ + 3t + 5
• B) (t + 5) ²
• C) \(\frac { 1 } { t + 5 }\)
• D) t ² + 2t + 1
• E) t + 5

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