Question

domain of f(x) = x^2-1 ÷ x^2+2​

Answer 1

Answer:

Correct option is B)

f(x)=

1+x

2

x

2

domain is R

let y=

1+x

2

x

2

⇒y+x

2

y=x

2

x

2

(y−1)+y=0

x

2

=

1−y

y

⇒x=±

1−y

y

, y



=1 & y≯1