Pearson Algebra 2 Common Core, 2011
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Pearson Algebra 2 Common Core, 2011 View details
6. Natural Logarithms
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Exercise 79 Page 483

To determine the inverse of switch x and y and solve for y.

Inverse: y=
Result: Yes, the inverse is a function.

Practice makes perfect
We will begin by finding the inverse of y. To do so, we need to switch x and y and solve for y. y=2 x^3+10 → x=2 y^3+10 The resulting equation will be the inverse of the given function.
x=2y^3+10
â–Ľ
Solve for y
x-10=2y^3
x-10/2=y^3
y^3=x-10/2
y=sqrt(x-10/2)
Now that we found the inverse of y, we will determine whether the inverse is a function. Let's recall that a function is a relation where each input is related to exactly one output. In this case, for each x, there is only one value of y. Therefore, the inverse is a function.