Question

if y = f(x)= 1-x/1+x , show that x = f(y)
$f(x) = \frac{1 - x}{1 + x}$
correct answer will be marked the brainliest (•‿•)​

Answer 1

ᴛʜᴇ ꜱᴏʟᴜᴛɪᴏɴ ɪꜱ ɪɴ ᴛʜᴇ ᴀᴛᴛᴀᴄʜᴍᴇɴᴛ

Answer 2

Answer:

f(x)=

x−1

x+1

fof(x)=

f(x)−1

f(x)+1

=

x−1

x+1

−1

x−1

x+1

+1

=

x+1−x+1

x+1+x−1

=x

i)(fofof)(x)=f(fof(x))=f(x)=

x−1

x+1

ii)(fofofof)(x)=fof(fof(x))=fof(x)=x