MODUL PECUTAN AKHIR SPM 2009 MATHEMATICS 2 The following formulae may be helpful in answering the questions. The symbol given are the ones commonly used. RELATIONS 1 n m n m a a a + = × 2 n m n m a a a − = ÷ 3 mn n m a a = ) ( 4 − − − = − a c b d bc ad A 1 1 5 ( ) S n A n A P ) ( ) ( = 6 ) ( 1 ) ' ( A P A P − = 7 2 1 2 2 1 2 ) ( ) ( Distance y y x x − + − = 8 Midpoint, + + = 2 , 2 ) , ( 2 1 2 1 y y x x y x 9 Average speed = taen ti!e trave""ed distance 1# Min = data o$ n%!&er data o$ s%! 11 Mean = s $re %encie o$ s%! $re %enc ) !ar (c"ass o$ s%! × 12 t*agoras +*eore! 2 2 2 b a c + = 13 1 2 1 2 x x y y m − − = 14 m = intercept ntercept − − − x i y i
