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Question

The set of values of x satisfying the system of inequations 5x+2<3x+8 and x+2x1<4 is

A
(,1)
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B
(2,3)
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C
(,3)
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D
(,1)(2,3)
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Solution

The correct option is D (,1)(2,3)
5x+2<3x+8
=2x<6
=x<3
x(,3)...............(i)
x+2x1<4
=x+2x14<0
=x+28x+4x1<0
=3x+6x1<0
case1
3x+6<0orx1>0
=x>2x>1
case2
3x+6>0orx1<0
=x<2x<1
Hencex(,1)(2,)............(ii)
fromintersectionof(i)and(ii)
x(,1)(2,3)

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