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25 Jan 2006, 09:25
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Question ) IF |x+2| = 4 ; what is the value of x ?
(1) x^2 (notequal to) 4
(2) x^2 =36
A only
B only
C both together
D each alone
E both not enough
(1) x^2 (notequal to) 4
(2) x^2 =36
A only
B only
C both together
D each alone
E both not enough
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25 Jan 2006, 10:00
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copper_waters
Agree with D.
Simplify equation:
|x+2| = 4
It means:
(x+2) = 4 i.e. x = 2 OR
(x+2) = -4 i.e. x = -6
S1: x^2 <> 4 or x <> -2, 2. this confirms x = -6. sufficient
S2: x^2 = 36 or x = -6 or 6. confirms x = - 6. sufficient
<> = not equal to
25 Jan 2006, 13:51
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x =2, -6.
I x not equal to 2,-2, SUFF.
II x equal to 6,-6...SUFF.
D.
I x not equal to 2,-2, SUFF.
II x equal to 6,-6...SUFF.
D.
