Edexcel Mathematics January 2023 · Paper 1 · Question 7 · ExamRizz

ExamRizzEdexcel MathematicsMathematics

January 2023 · Paper 1 · Question 7 · 8 marks

7. The function f is defined by f(x) = 3 + x−2 x ∈  x > 2 (a) State the range of f (1) (b) Find f–1 (3) The function g is defined by g(x) = 15 3x−x ∈  x ≠ 3 (c) Find gf (6) (2) (d) Find the exact value of the constant a for which f(a2 + 2) = g(a) (2) 15

Lesson: Laws of Indices