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If f(x) = |[x+a,x+2,x+1],[x+b,x+3,x+2],[...

If `f(x) = |[x+a,x+2,x+1],[x+b,x+3,x+2],[x+c,x+4,x+3]|` and `a - 2b + c = 1` then

A

`f(50) = 1`

B

`f(-50) = -1`

C

`f(50) = 501`

D

`f(50) = -501`

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The correct Answer is:
A
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