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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)
2,-3)(b) R =√ 10 , C 1,3)
1,3)(c) R = √10 , C -3,2)
-3,2)(d) R = 6, C -1,4)
-1,4)(e) R = 3, C -3,-3)
-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