IGCSE Mathematics 0580/04/SP/20 Q7

Question

7. f(x) = 2x + 1    g(x) = x2 + 4 h(x) = 2x        h(x) = 2x

    (a) Solve the equation f(x) = g(1).


     (b) Find f−1(x).

 

      (c) Find gf(x) in its simplest form.

 

      (d) Solve the equation h−1(x) = 0.5 .

 

      (e)  1/h(x) = 2kx

Write down the value of k.

 

 

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