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بلييز

ضرووري لأ، امتحاني13/1/2009

6. The amount of 612 Dirhams is reduced by 40%, and is then increased by 60%, then the

final result is:

(a) 636.48

(b) 346.88

(c) 465.12

(d) 587.52

(e) 1224.0



8.The number of solutions in [0,2∏] satisfying the equation cos(2x) = 1 is:

(a) 0

(b) 1

(c) 2

(d) 3

(e) 4

10. If (x ) = x2 +1 and g(x) = √4 − x , then the value of ( f ○g)(− 5) is:

(a) 10

(b) -10

(c) Undefined

(d) 30

(e) 2

13. If A(2,3) is the midpoint of B(x, y) and C(1,−7), then the coordinates

of the point B are:

(a) (5,−1)

(b) (3,13)

(c) (3/2,−2)

(d) (1/2,5)
(e)(1/2,-2)

15. The area of an equilateral triangle with side-length 6 cm is:

(a) 9 √ 3cm2

(b) 6 √3 cm2

(c)12 √2 cm2

(d) 9 √ 2 cm2

(e)36 ∏cm2

18. The radius ( R ) and the center ( C ) of the circle x2 + y2 +6 x −4 y +3 = 0 are:

(a) R = 5, C 2,-3)

(b) R =√ 10 , C 1,3)

(c) R = √10 , C -3,2)

(d) R = 6, C -1,4)

(e) R = 3, C -3,-3)

19. If (x )= 2x2 +3 , then

f(x+h ) -( x) / h

equals:

(a) h + 3

(b) 4x + 2h

(c) 2x − 2h

(d) _ 2

(e) 3