Question

True or false?
The inverse of the function y = 2x + 8 is y = x – 8/ 2

Answer 1

true

Answer 2

y=2x+8 exchange x and y getting
x=2y+8
2y=x-8
y= x/2-4
Looks like answer should be false

Answer 3

To be sure I am going to try and verify my answer
\[f(f ^{-1}(x)=f((x/2)-4)=2((x/2)-4)+8=x-8+8=x\] Seems to check out.

Answer 4

but (x – 8)/ 2 = (x/2) - 4
so where is the wrong part!!

Answer 5

Well I see x - 8/2
not (x-8)/2
Are you assuming that is what it means??

Answer 6

yes i think x - 8/2 means (x-8)/2
@FC Barcelona13 check it... if it is (x-8)/2 then the answer is TRUE
if not then the answer is FALSE

Answer 7

that should remove all doubt hoblos

Answer 8

It would be nice if all ambiguity was eliminated in the posted questions. A prudent use of parenthesis could help a lot.