1if u post many questions @ a 1 go....plz post ur working also.
it will help u get some gud replies.
if a function f: R→A given by f(x) = ex-e-|x|ex+e|x| is surjection, find A
-
UP 0 DOWN 0 0 9
9 Answers
1
62The basic question is to find the range...
I suggest that you divide by ex in numerator and deno..
You will be left with \frac{1-e^{-sgn(x)}}{1+e^{sgn(x)}}
sgn(x)=1 or -1 or 0
so theset A will be {(1-1/e)/(1+e), (1-e)/(1+1/e), 0}
341@nishant: you are gonna regret that post if it becomes too old to edit :D :D
62Lol.. is it?... It seems that I am still sleeping :D
Cant see any reason to regret yet :|
341I am gonna hear a loud smacking sound as your palm touches your forehead.
\frac{e^{|x|}}{e^x} \ne e^{\frac{|x|}{x}}
1lol
koi nahi Sirji.....Badey-badey logon ke sang aisi choti-choti batein hoti rehti hain :P [4][3]
62oh... :D
:D :D
haan
"Bade bade shehron mein aisi chhoti chhoti baatein hoti rehti hai,"
and haan the post is already too old to edit :D
