56
Answers
Answers
Put 1/x in the expression of f (x)=x^2-1/x^2...... the expression will be changed to 1/x^2-x^2 which is equal to -f (x)....
over 7 years ago
Sidhant ku...
put the 1/x in places of x.... simplify.... you will surely get the negative of it
almost 9 years ago
Shubhadeep...
when you substitue 1/x in the place of x and take out negative sign common, then the sign of both changes(+ becomes -). you get -f(x)
almost 10 years ago
Cathrine
In the expression of f(x), put x=(1/x). Hence we get f(1/x)=(1/x^20-(x^2),ie, -f(x)
about 10 years ago
Angan mukh...
expand x2- 1/x2 such that you get (x-1/x)(x+1/x). now we can substitute f(1/x) in places of x. after substituting we get, (1/x-x)(1/x+x). open the brackets and we get (1/x2-x2) which actually looks as if we got it by changing signs..so the correct option is 2.
about 10 years ago
Vaishnavi
just put 1/x in place of x....
and then answer will come as 1/x^2-x^2 which is -(x^2-1/x^2) = -(f(x))...
about 10 years ago
Anuj pant
put 1/x instead of x in f(x). Then check the answer for f(x) by taking lcm. The answer will be equal to 2)-f(x)
over 10 years ago
Umesh
firstly,on replacing x with 1/x.....in f(x)....then in geting result, apllly minus on both sides ..n the answer is -f(x)
over 10 years ago
Gujjula vi...
substitute 1/x in place of x in f(X)
now f(X)= x^2-1/(x^2)
f(1/x)=1/(x^2)-x^2
taking minus common,
f(1/x)=f(X)
over 10 years ago
Kajol chat...
Ya its easier .. Just put 1/x in place of x in the function and then take - ( minus) common from the result you will get your answer
over 10 years ago
Sushil
yes.....just substitute 1/x in the place of x in f(x) and then take (-) common
over 10 years ago
Rohitha ch...
put (1/x) instead of x in the function f(x), we get
f(1/x)= (1/x)^2 - (1/(1/x))^2=(1/x)^2- (x^2)= - (x^2-(1/x)^2)=-f(x)
over 10 years ago
Susmita ch...
F(x)=x2-1\x2
therefore
f(1\x)=(1/x2)-1\(1\x2)
-f(1\x)=(1\x2)-x2;
that is -f(x)
over 10 years ago
Call me dh...
simply put (1/x) in the value of (x) then multiply with -ve sign.
almost 11 years ago
Somendra g...
In place of "x" in the given function substitute 1/X
f(1/x)=(1/x)^2 -(1/1/x)
about 11 years ago
Prasad
f(x) is given put 1/x in place of x2 then solve it u will get -f(x)
about 11 years ago
Shreyasi s...
F(x)=x2-1/x2
Put x=1/x so,
F(1/x)=1/(x)2 -1/1(x)2
F(1/x)=1/x2-x2
F(1/x)=-F(x)
over 11 years ago
Alen rujis
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