functions...

if f(x)= log(1+x1-x) ; g(x) = log(3x+x31+3x2) then find f(g(x)) in terms of f(x).

1) -f(x)

2) 3f(x)

3) [f(x)]3

4) -3f(x)

11 Answers

62
Lokesh Verma ·

This is a good question

but are you sure that g(x) has log around it?

x=tan k
then g(X) = log (tan x)

Then try it..

29
govind ·

Bhaiya i din get ur post ..i also feel that log shud not be there in g(x) ...but how putting x = tank we get g(x) = log(tanx)

in tan3x formula we have - signs ..but here we have + ..

1
Manmay kumar Mohanty ·

yup govind's rite bhaiya how by putting x = tank we get g(x) = log(tanx) ...... i did get it either ???[7]

62
Lokesh Verma ·

yup i know :P

I was sleeping as always :D

1357
Manish Shankar ·

Putting x=iy may help

1
student ·

manish shankar sir
did u mean
x=itany

341
Hari Shankar ·

If g(x) does not have log, then we get f(g(x)) = 3 f(x)

1
student ·

putin x=i tan y
g(x)=i tan 3y
f(g(x))= 6iy
f(x)=2iy
f(g(x))= 3f(x)

i think she has done / or the book has done the printing error

1
vinutha student ·

the question is the same.....no error in it,...!! g(x) and f(x) has log around it....

62
Lokesh Verma ·

hmm.. sounds interesting vinutha...

Could you tell me the source of the question?

1
SURYA RAMKUMAR ·

@nishant sir there ias a image in ur chatbox........plz see it n reply[2][2]..........plz don ignore!!!!!!!

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