Question

Let X= {[a b c d] / a,b,c,d ∈ R}. If f:X → R is defined by f(A) = det (A) ⦡ A ∈ X, then f is:

• A. one-one but not onto
• B. onto but not one-one
• C. one-one and onto
• D. neither one-one nor onto

Answer 1

Answer: (B)

onto but not one-one

Answer 2

The correct option is: (B) onto but not one-one