Let f: (-1,1)-B,be a function defined by f(x)=____ then f is both one-one and onto when B is in the interval :

Question

Let f: (-1,1)->B,be a function defined by f(x)=____ then f is both one-one and onto when B is in the interval :

dls · Answer

$$\LARGE f(x)=\frac{2x}{1-x^2}$$

sirm3d · Answer

do you know how to graph f(x)? the graph can aid you in determining the interval B.

dls · Answer

no,not this one

anonymous · Answer

Its graph should be some what like this....|dw:1367759005932:dw|
So I think its range is (-infinity,+infinity) and it is one one and onto in this range

dls · Answer

options are 0 to pi/2 and -pi/2 to pi/2 u can permute the brackets in 2p1 ways and get the 4 options :)

anonymous · Answer

Where the hell did u get pi in this sort of funx????

dls · Answer

@shubhamsrg

shubhamsrg · Answer

yes @DLS ?

dls · Answer

batao @shubhamsrg

anonymous · Answer

hahahah

anonymous · Answer

I think my graph is correct!!!!

shubhamsrg · Answer

hmm.. it is given the domain is (-1,1) 
try x=tan t ^_^

dls · Answer

2tan^-1x aya na