3 years ago

Let f(x) = x^2 – 81. Find f–1(x). Can someone double-check what I have?

Mathematics

2 answers:

Trava [24]3 years ago

5 0

I hope this helps you

y=x^2-81

x^2=y+81

x=square root of y+81

f^-1 (x)= square root of x+81

Stella [2.4K]3 years ago

5 0

<span>For the answer to the question above, if you are just checking your answer, I'll just show the solution. Is it just ok?
f(x) = x2 - 81
y = x^2 - 81
x = y^2 - 81
x + 81 = y^2
y = ± √(x + 81)

f⁻¹(x) = ± √(x + 81) answer

Answer is ±√x+81

I hope I helped you with my answer somehow.</span><span>
</span>

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