Paper 1MA1: 2F Question Working Answer Mark Notes 14 (a) 5(1 2m) B1 cao – (b) 2ab(a + 3b) M1 for 2a(ab + 3b2) or 2b(a2 + 3ab) or + 6b) ab(2a or 2ab( 2 term expression with terms in or or can include constants), a b ab, eg 2ab(1a + 3ab), 2ab(1 + 3b) A1 for 2ab(a + 3b) 15 (a) 0.47 B1 (b) 2.28 × 109 M1 for correct but not in standard form, eg 22.8 × 103+5, 228 × 107, 2 280 000 000 or for 2.28 × 10n , 9 n ≠ A1 cao 16 on the map C1 for showing a perpendicular bisector or point equidistant from points and T T B C. C1 for a circle or arc of circle of radius 2.5 cm or point 2.5 cm from point T A C1 for shown in correct position T
Paper 1MA1: 2F Question Working Answer Mark Notes 14 (a) 5(1 – 2m) B1 cao (b) 2ab(a + 3b) M1 for 2a(ab + 3b2) or 2b(a2 + 3ab) or ab(2a + 6b) or 2ab( 2 term expression with terms in a or b or ab, can include constants), eg 2ab(1a + 3ab), 2ab(1 + 3b) A1 for 2ab(a + 3b) 15 (a) 0.47 B1 (b) 2.28 × 109 M1 for correct but not in standard form, eg 22.8 × 103+5, 228 × 107, 2 280 000 000 or for 2.28 × 10n , n ≠ 9 A1 cao 16 T on the map C1 for showing a perpendicular bisector or point T equidistant from points B and C. C1 for a circle or arc of circle of radius 2.5 cm or point T 2.5 cm from point A C1 for T shown in correct position
1ma1_2f_-_june_2017_mark_scheme.docx