Write the inverse function for the function, ƒ(x) = 1/2x + 4. Then, find the value of ƒ -1(4). Type your answers in the box
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Answer:
Option 2: -¾
Step-by-step explanation:
First identify 2 points on the line.
(0, 1), (4, -2)
Substitute the coordinates into the gradient formula below:
☆ (x₁, y₁) is the 1st coordinate and (x₂, y₂) is the 2nd coordinate.
Slope of the line
☆ Since the line is sloping downwards looking from the left to right, the line must have a negative slope.
The solution is x = 36, and the sum of the digits is 3 + 6 = 9.
<h3>How to find the value of the number?</h3>
We know that, if we define x as the number, we have:
x + x^2 + √x = 1338
Now we need to find the value of x.
Trivially, we can graph the function:
y = x + x^2 + √x
We can see that the solution of x + x^2 + √x = 1338 is
x = 36
36 + 36^2 + √36 = 1338
Then the sum of the digits of the number is 3 + 6 = 9
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