MATHEMATICS · Multi-part · A Level · Mathematics · Algebra and Functions · Algebra and Functions
Problem
Consider the function g(x)=x2−45−2x.
(i) Determine the domain of g.
(ii) Give a clear reason why the input x=2 is not permitted in the domain.
(iii) Evaluate g(1), simplifying your answer as far as possible.
(iv) State, with justification, whether the value obtained in part (iii) is positive or negative.