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kaheart [24]
3 years ago
8

F(x)=

alt=" \frac{4x - 7}{10} " align="absmiddle" class="latex-formula">
then what is f^-1(x)​
Mathematics
1 answer:
Naily [24]3 years ago
7 0

Answer:

To find f-¹(x) of f(x) equate f(x) to y

That's

f(x) = y

So we have

y =  \frac{4x - 7}{10}

Next interchange the variables that's x becomes y and y becomes x

That's

x =  \frac{4y - 7}{10}

Next make y the subject

Cross multiply

We have

4y - 7 = 10x

Move -7 to the right side of the equation

4y = 10x + 7

Divide both sides by 4

We have the final answer as

y =  \frac{10x + 7}{4}

So

f ^{ - 1} (x) =  \frac{10x + 7}{4}

Hope this helps you

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