Question

with steps on how to plz
if f(2)=4 find f-1 (4)

Answer 1

by f-1(4) you mean \[f ^{-1}\](4) right

Answer 2

yes

Answer 3

with step plz if u can

Answer 4

if thats the case, then when f(2) = 4, f^-1 (4) = 2. when you see f^-1, it means switch the x and the y in the function. for example, if you have the function y=3x, f^-1 of that is x=3y
also, another example, the notations f(x) = 3x-5 and y=3x-5 are the exact same, in other words, f(x) = y
so, back to the original f(x)
you know that f(2) is 4, in other words, x=2 and y=4
if youre finding f^-1, then just switch the values of x and y, so now y is 2 and x is 4
it asks for f^-1(4)
this equals 2 because you can treat it as f(x) with the new values. if we plug in the new x value, we get f(4), and since f(x) = y, f(4) = y, or f(4) = 2

Answer 5

wow thank you