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For the function f(x)=x^2-12 find (f^-1)(4)
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For the function f(x)=x^2-12 find (f^-1)(4)

User YAMAMOTO Yuji
by
8.5k points

1 Answer

3 votes
f(x) = x^2 - 12
y = x^2 - 12
y + 12 = x^2
x = sqrt(y + 12)
(f^-1)(x) = sqrt(x + 12)

(f^-1)(4) = sqrt(4 + 12) = sqrt(16) = 4
(f^-1)(4) = 4
User Mamruoc
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7.9k points
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