1.

If |(alpha,x,x,x),(x,beta,x,x),(x,x,gamma,x),(x,x,x,delta)| = f(x) - x f' (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 these

Answer :A


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