@simrodevi8210
bro the answer is b.
because
here f(x) =lg{(1+x)/(1-y)}[ let this be 1]that means that when input is x the expression is above but when f(y) is there means input will be y the thing will become
f(y)=lg{(1+y)/(1-y)} [let this be 2] so f(x)+f(y)= lg(1)+lg(2) which by property of lg of same base will be
lg(1×2)=lg(1+y+x+yx)/(1-x-y-xy)[let this be3] and if you put option (b) inside in f(x) or f(argument written inb only argument not f symbol)={(1+(option b)}/{(1-(optionb) you will ge same as lg[3] so
@skyda2425
Bro its hard for an IX student
@bhargavibanoth5305
B is the answer The question needs the knowledge of 2 logarithm formulae Log(ab)=loga+logb Log(a/b)= loga-logb Use these formulas to simplify 2 log functions fx and fy Equate the argument of resultant log function to (1+z/1-z) Answer will be fz which is option b
@edryastewoflos
Answer may be B,f(x+y/1+xy)
@koteswararaodivvala7682
Nice question bro I really love it bro😊❤❤❤❤
@headshotgaming7652
Bhai mene toh page le hi ans de Diya 😂😂 Exam pass 😂
@Subscribe_Please_0
How can be this IX class Mathematics 😂
@edisonliao3939
our teacher made us try this question
@memes_0077
is my left earphone damaged??
@vaijayantipethe9537
f of x? Function of x
@kasturipatra2089
Ans. A, distributive property nahi kya, pardon me if I'm wrong, I am in class 7 😅😅
@RealDeathDefeater
Tf the question is wrong.. there is no eqn of f(y)
@TheGuacamoleGamer
You are very smart! :D I wish I can do this in 8th grade also. Do you have any advice?
@UhrBushaltestelle
My right ear 😭😭
@RudraShukla-z2i
Answer b bro it's so easy with time taking a bit
@NSriAditya
Hit 1 Put x=1/2,y=1/3 Optn B will come,to surely deny D put x,y=0,0
@koteswararaodivvala7682
The correct option is B
@harshit-g7j
IIT dholakpur confirmed
@Deniz.841