Alternative method: use, withand. Award one mark for the attempt and one for the correct answer. Pearson Progression Step Q Scheme Marks AOs and Progress descriptor Shows or implies that if = 0, = 1 1.1b 7th 4a M1 y t Solve coordinate Finds the coordinates of A1 1.1b P. geometry problems involving parametric equations. (2) Attempts to find a cartesian equation of the curve. For example, 2.2a 7th 4b M1 = 2 is substituted into t x − coordinate geometry Correctly the cartesian equation of the curveAccept any A1 1.1b problems equivalent answer. For example, involving parametric equations. (2) 2.2a 7th 4c M1 Solve coordinate Substitutes = to find = 1 and M1 1.1b t −1 x geometry problems Finds the gradient of the normal M1 1.1b involving parametric Substitutes = to find = 1 and = A1 1.1b t x y −1 −2 equations. an attempt to find the equation of the normal. For M1 1.1b example, is seen. States fully correct answer A1 1.1b (6) 4d Substitutesandintoobtaining M1 ft 2.2a Manipulates and simplifies this equation to obtain M1 ft 1.1b Factorises and solves to find = or = M1 ft 1.1b t t −1 −11
Alternative method: use, withand. Award one mark for the attempt and one for the correct answer. Q Scheme Marks AOs Pearson Progression Step and Progress descriptor 4a Shows or implies that if y = 0, t = 1 M1 1.1b 7th Solve coordinate geometry problems involving parametric equations. Finds the coordinates of P. A1 1.1b (2) 4b Attempts to find a cartesian equation of the curve. For example, t = x − 2 is substituted into M1 2.2a 7th coordinate geometry problems involving parametric equations. Correctly the cartesian equation of the curveAccept any equivalent answer. For example, A1 1.1b (2) 4c M1 2.2a 7th Solve coordinate geometry problems involving parametric equations. Substitutes t = −1 to find x = 1 and M1 1.1b Finds the gradient of the normal M1 1.1b Substitutes t = −1 to find x = 1 and y = −2 A1 1.1b an attempt to find the equation of the normal. For example, is seen. M1 1.1b States fully correct answer A1 1.1b (6) 4d Substitutesandintoobtaining M1 ft 2.2a Manipulates and simplifies this equation to obtain M1 ft 1.1b Factorises and solves to find t = −1 or t = −11 M1 ft 1.1b
al_maths_pure_unit_7_ms.docx