1. GRAPHS QUESTION 9 1.1 At turning point : Substitute Substitute Equation (i) - - - (i) Substitute Substitute in Equation (ii) - - - (ii) (i) + (ii): Substitute into (ii): (7) 1.2 At C: But at A factor OR touching point at A C (3) 1.3 Turning point of k: (2)
1. GRAPHS QUESTION 9 1.1 At turning point : Substitute - - - (i) Substitute in - - - (ii) (i) + (ii): Substitute into (ii): Substitute Equation (i) Substitute Equation (ii) (7) 1.2 At C: But at A OR touching point at A C factor (3) 1.3 Turning point of k: (2)