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+VOF 2VFTUJPOC
2VBESBUicJOFRVBMJUZ
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7. The equation x 2 + kx + ( k + 3 )
= 0 , where k is a constant, has different real roots.
(a) Show that
k 2 - 4 k - 12 > 0 .
(2)
(b) Find the set of possible…

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+BOVBSZ
2VFTUJPOC
2VBESBUJDJOFRVBMJUZ

Leave blank 8. The equation
x 2 + kx + 8 = k has no real solutions for x.
(a) Show that k satisfies .
(3)
(b) Hence find the set of possible values of k.
(4)
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12


*N25561A01224*

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Pages in this set

Page 1

Preview of page 1

Page 2

Preview of page 2
+VOF 2VFTUJPOC
2VBESBUicJOFRVBMJUZ
Leave blank

7. The equation x 2 + kx + ( k + 3 )
= 0 , where k is a constant, has different real roots.
(a) Show that
k 2 - 4 k - 12 > 0 .
(2)
(b) Find the set of possible…

Page 3

Preview of page 3
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
12


*H26107A01224*

Page 4

Preview of page 4

Page 5

Preview of page 5
+BOVBSZ
2VFTUJPOC
2VBESBUJDJOFRVBMJUZ

Leave blank 8. The equation
x 2 + kx + 8 = k has no real solutions for x.
(a) Show that k satisfies .
(3)
(b) Hence find the set of possible values of k.
(4)
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___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________…

Page 6

Preview of page 6
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___________________________________________________________________________
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12


*N25561A01224*

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