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Question

If |x1|+|x4|=4, then x

A
{12,92}
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B
{12,92}
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C
{92,12}
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D
{92,12}
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Solution

The correct option is B {12,92}
If x<1,
x+1x+4=4
x=12

If 1x<4,
x1x+4=4
3=4 (Not possible)

If x4,
x1+x4=4
x=92

x=12,92

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