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GCE AS and A Level MATHEMATICS FORMULA BOOKLET

WJEC CBAC Ltd. GCE AS and A Level MATHEMATICS FORMULA BOOKLET From September 2017 Issued 2017 WJEC CBAC Ltd. 2 Pure MATHEMATICS Mensuration Surface area of sphere = 24r Area of curved surface of cone = heightslant r Arithmetic Series Sn = 21n(a + l) = 21n [2a + (n 1)d] Geometric Series Sn = rran 1)1( S = ra 1 for | r | < 1 Summations )12)(1(6112 nnnrnr 224113)1( nnrnr Binomial Series 111rnrnrn )( 2 1)(221NN nbbarnbanbanabanrrnnnnn where )!(!!C rnrnrnrn ) ,1( )1()1( )1(1)1(2RR nxxrrnnnxnnnxxrn Logarithms and exponentials xaxa lne Complex Numbers )sini(cos)}sini(cos{ nnrrnn The roots of 1 nz are given by nkzi2e , for 1 , ,2 ,1 ,0 nk WJEC CBAC Ltd.

principle of least squares. The least squares estimate Ö of the parameter is given by Ö xy xx S S . The least squares estimate Ö of the parameter is given by yxÖ. The least squares regression line is given by yx Ö. Spearman's rank correlation coefficient is given by 2 2 6 1 1 i s d r nn . SS/MLJ/W05(16)E 2.12.16

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