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Goshia [24]
3 years ago
7

Which of the following is true for the relation f(x) = x2 + 8?

Mathematics
1 answer:
lilavasa [31]3 years ago
4 0

Answer:

Only the equation is a function

Step-by-step explanation:

we have

f(x)=x^{2} +8

Find out the inverse of f(x)

Let

y=f(x)

y=x^{2} +8

Exchange the variables (x for y and y for x)

x=y^{2} +8

Isolate the variable y

y^{2}=x-8

square root both sides

y=(+/-)\sqrt{x-8}

Let

f^{-1}(x)=y

f^{-1}(x)=(+/-)\sqrt{x-8}

The inverse function is not a function (because for one input value the function has two different output values)

therefore

Only the equation is a function

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