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Question

If a - 2b + c = 1, then the value of ∣ ∣x+1x+2x+ax+2x+3x+bx+3x+4x+c∣ ∣ is

A
x
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B
- x
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C
-1
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D
1
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Solution

The correct option is C -1
∣ ∣x+1x+2x+ax+2x+3x+bx+3x+4x+c∣ ∣Apply the operation,R1R12R2+R3R3R3R2,the determinant reduces to∣ ∣001x+2x+3x+b11cb∣ ∣=1

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