1.

If |{:(alpha,x,x,x),(x,beta,x,x),(x,x,gamma,x),(x,x,x,delta):}| =f(x)-xf'(x) then f(x) is equal to

Answer»

`(x-alpha)(x-beta)(x-gamma)(x-delta)`
`(x+alpha)(x+beta)(x+gamma)(x+delta)`
`2(x-alpha)(x-beta)(x-gamma)(x-delta)`
NONE of the above

Answer :A


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