Question

If f: R→R defined by f(x) = x^2 + 1 , find f(-4) and also find the pre-image of −3

Answer 1

Answer:

f(-4) = 15

pre-image of -3 is not possible.

Step-by-step explanation:

f(x)=x²+1

f(-4) = 4²-1

f(-4) = 15

Pre-image of -3,

-3= x²+1

x² = -4

x€ Irrational numbers

But f:R-->R, hence pre-image of -3 is not possible.