Question: The function f(x) is defined by f : x x 2 + 6x 4, x , x > a, for some constant

The function f(x) is defined by f : x ↦ x2 + 6x − 4, x ∈ ℝ, x > a, for some constant a.

a. State the least value of a for which f−1 exists.

b. Given that a = 0, find f−1, stating its domain.

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