4 years ago

(3x^2)^-3y divided by xy

Mathematics

1 answer:

scZoUnD [109]4 years ago

8 0

The number in the photo should be the answer but the problem might just be that your question was worded incorrectly.

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Let f(x) = x2 − 81. Find f−1(x).

Umnica [9.8K]

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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