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3 years ago

Let f(x) = x2 − 81. Find f−1(x).

1 answer:

3 0

F(x) = x² - 81

Finding f⁻¹(x) the inverse function

Let y = f(x) and solve for x.

y = x² - 81

y + 81 = x²

x² = y + 81

x = √(y + 81)

Recall f(x) = y, that means x = f⁻¹(y)

x = √(y + 81)

f⁻¹(y) = √(y + 81)

Therefore f⁻¹(x) = √(x + 81)

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Explanation:

Since we have given that

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2 years ago

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8 0

2 years ago

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Alla [95]

Move the -5 over by adding 5 to both sides
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IgorLugansk [536]

I hope this helps you

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kolezko [41]

Answer:

hmm.. very blurry repost please

Step-by-step explanation:

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