Math

QuestionAre the functions f(x)=21x14f(x)=21x-14 and g(x)=x21+14g(x)=\frac{x}{21}+14 inverses? Yes or No?

Studdy Solution

STEP 1

Assumptions1. The function f(x)f(x) is defined as f(x)=21x14f(x) =21x -14 . The function g(x)g(x) is defined as g(x)=x21+14g(x) = \frac{x}{21} +14
3. We need to check if these functions are inverses of each other

STEP 2

To check if two functions are inverses of each other, we need to verify two conditions1. f(g(x))=xf(g(x)) = x
2. g(f(x))=xg(f(x)) = x

STEP 3

First, let's calculate f(g(x))f(g(x)). We substitute g(x)g(x) into the function f(x)f(x).
f(g(x))=21(g(x))14f(g(x)) =21(g(x)) -14

STEP 4

Now, substitute the expression for g(x)g(x) into the equation.
f(g(x))=21(x21+14)14f(g(x)) =21\left(\frac{x}{21} +14\right) -14

STEP 5

implify the equation.
f(g(x))=x+29414f(g(x)) = x +294 -14

STEP 6

implify further.
f(g(x))=x+280f(g(x)) = x +280

STEP 7

As we can see, f(g(x))f(g(x)) does not equal to xx. Therefore, the first condition is not satisfied. Hence, the functions f(x)f(x) and g(x)g(x) are not inverses of each other.
The answer is No, they are not inverses.

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