B1 M1 A1,A1 (4) [8] Question Scheme Marks Number 9(a) B1 Assume true for = so that n k M1 A1 A1 If true for = then true for = + 1 and as true for = 1 true for all n k n k n n A1 cso (5) (b) Condone use of here. n B1 M1 A1 A1 If true for = then true for = + 1 and as true for 1 true for all m k m k m = m A1 cso (5) [10] JUNE 2013 (R) MARK SCHEME Question Scheme Marks Number 1. (a) B1
B1 M1 A1,A1 (4) [8] Question Number Scheme Marks 9(a) B1 Assume true for n = k so that M1 A1 A1 If true for n = k then true for n = k + 1 and as true for n = 1 true for all n A1 cso (5) (b) Condone use of n here. B1 M1 A1 A1 If true for m = k then true for m = k + 1 and as true for m = 1 true for all m A1 cso (5) [10] JUNE 2013 (R) MARK SCHEME Question Number Scheme Marks 1. (a) B1
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