11 (a) 76.0 3 P1 for tan = x P1 for (= 75.963..) tan−1 A1 75.9 76 − (b) Description 1 C1 ft e.g. decreases value of h 12 (a) + 2n 3 M1 correct deduction from differences, n2 e.g. 2nd difference of 2 implies 1n2 or 12, 22, 32 M1 12, 22, 32 linked with 2, 4, 6, A1 + 2n oe n2 (b) Explanation 1 C1 explanation that 31 is not a power of 2
11 (a) 76.0 3 P1 for tan x = P1 for tan−1 (= 75.963..) A1 75.9 − 76 (b) Description 1 C1 ft e.g. decreases value of h 12 (a) n2 + 2n 3 M1 correct deduction from differences, e.g. 2nd difference of 2 implies 1n2 or 12, 22, 32 M1 12, 22, 32 linked with 2, 4, 6, A1 n2 + 2n oe (b) Explanation 1 C1 explanation that 31 is not a power of 2
GCSE_Mathematics_2H_MS.docx