Question

Which represents the inverse of the function f(x) = 4x?

h(x) = x + 4
h(x) = x – 4
h(x) = x3/4x
h(x) = x1/4x

Answer 1

to find an inverse, swap x and y

x = 4y

now make y the subject.... and the answer is the inverse

Answer 2

which is 3????

Answer 3

\[given\ f(x)= 4x\\to \ find \ inverse\ of\ f(x) \ say \ h(x)\\ switch\ x \ and \ f(x) \\ i.e.\ x=4f(x)\\solve\ for\ f(x)\\here\ f(x)=\frac{ x }{ 4 }\\replace \ f(x)\ by\ h(x)\\ get\ h(x)= \frac{ x }{ 4 }\]

Answer 4

@elzabeth22950 sure! options 4th posted correctly? \[h(x)=\frac{ x }{ 4} is \ correct.\]