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x
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x
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x
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(61
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324)(85
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...
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2004 B). The expression4 3 +21 −6
x
x has the same remainder when divided by (x−a)or by(x+b)where
a
≠
−
b
. Find the value ofa2 +b2 −ab!
137. The equation x3 +ax2 +bx+c=0has three distinct integral solutions and
c
is a prime number. Find the largest possible value ofa
.138. Given that
a
is a root of the quadratic equationx2 −3x+1=0. Find the value of1
8
22 4
+
−
a
a
a
139. If
a
a
a
...
=
a
+
a
+
a
+
...
, find the value ofa
140. For positive real
x
, 2 . . .x
x
xx=
.Find all possible values ofx
For question 39, 40, and 41
Let a,b,cbe the roots of the equationx3 −2007x2 +2008x−2009=0. Find the value of
141.
(
)(
)
)
(
)
)(
(
)
(
)
)(
(
)
(
b
c
a
c
b
a
ab
a
b
c
b
a
c
ca
c
a
b
a
c
b
bc
−
−
+
+
−
−
+
+
−
−
+
142.
)
)(
(
1
)
)(
(
1
)
)(
(
1
b
c
a
c
c
a
b
c
b
b
c
a
b
a
143.
Evaluate the following limits
,. $ " $ 3 2
x
+
px
+
qx
+
r
- !(
x a
−
)(
x
+
a
)(
x b
−
)
(# 1 ( H( B
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,0 "1 x1000−1 $ #x2 −1 $ #%
,4 ' ( 1( 9 $ # - " 3x3−x2−5x+ =6 0( "
$ +
(
2 2 2)
a b c abc a b c
+ +
+ +
. = $ # + 26 6 13 4 8 2 6 2 5+ − + − E 26 6 13 4 8 2 6 2 5− + − + B
. = $ # + 3
45 29 2
+
+
345 29 2
−
B.& $
x
! " " # 3 32
x
+
x
− =
4
2
B.) '
4
3
1
2
−
−
x
x
: ( $ # $
.* 2 # - $ $ " $ : .()
" 1 ! : (& ' $ # $ $ " "1 #
$ $ $ " - $ ! 1 " 3 0(.
" 1 ! " 3 &(* 8 # $ E
., ' ; < : E
....
2
1
2
1
2
1
+
+
+
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x
x
I $ # $
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99 . ' 99
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f
f
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+
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/ $ # $ " " " + : 3 ) D 13 9 ) E 0
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3
4
2
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+
5
−
x
−
2
y
+
3
=
9
6
2
2
x
+
4
y
+
5
+
x
−
2
y
+
3
=
44 1 $ 1 # 3 3
9"( " $ ! " 3 410cm2 $ 1 # 1 1 $ $ 1 !
, 9" 3 ! "1 # , 9"( "
$ ! 1 30cm2 $ $ 3 B
& " $ 8 " " $ 1 ) + *
. # ! $ $ 1 1 , + / 8 # 1 "