THE LAINAKU JOINT ASSESSMENT

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(a) SVT: (2mks) (b) SQR: (2mks) (c) VQT: (3mks) (d) QSR: (3mks) 18. The fourth ,eighth and sixteenth terms of an arithmetic progression (A.P) are the second , third and fourth terms of a geometric progression (G.P). If the common difference of the A.P is 3, find (a) The common ratio of the G.P. ( 5 marks ) © The Lainaku Joint Assessment www.kcse-online.info Mathematics 121/2 Turnover Page 8 of 15
(b) The last term of the A.P given that there are twenty terms. ( 2 marks ) (c ) The sum of the first ten terms of the G.P. (3 marks ) 19. A triangle has vertices of A (2, 3) B (2, 1) and C(6, 1). It is mapped onto triangle A 1 B 1 C 1 by a transformation matrix (a) Plot the object ABC and the image triangle a A 1 B 1 C 1 on the Cartesian plane below. ( 3 marks ) (b) On the same axis plot triangle A 11 B 11 C 11 is the image of triangle A 1 B 1 C 1 under a reflection in the line x = 0. Plot the image triangle A 11 B 11 C 11 . ( 2 marks ) (c )Triangle A 11 B 11 C 11 is transformed by matrix onto triangle A 111 B 111 C 111 .Plot the image triangle A 111 B 111 C 111 hence or otherwise find the area of image triangle A 111 B 111 C 111 . ( 3 marks ) © The Lainaku Joint Assessment www.kcse-online.info Mathematics 121/2 Turnover Page 9 of 15
Page 1 and 2: Name…………………………
Page 3 and 4: 4. Make Q the subject of the formul
Page 5 and 6: 10. The cost of maize flour and mil
Page 7: 16. The following is a section of a
Page 11 and 12: Calculate (a) the length EN. (2mks)
Page 13 and 14: From your graph:- (i) Estimate the
Page 15: (b) Use your graph to solve the equ

THE LAINAKU JOINT ASSESSMENT

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