Question

let f:R ➡R be a function given by f(x) = x^2+1 . find f^-1(-4) , f^-1(5) ​

Answer 1

Step-by-step explanation:

y=f(x)

finverse (y)=x

y=x^2+1

y-1=x^2

sqrt(y-1) = x

f inverse(-4)=sqrt(-4-1)=sqrt(-5)

which is not possible as we cannot find sqrt of negative no.s

f inverse (5)=sqrt(5-1)=sqrt 3=1.732