Let f(x) = x^4 + ax^3 + bx^2 + cx + d be...

Let` f(x) = x^4 + ax^3 + bx^2 + cx + d` be a polynomial with real coefficients and real roots. If |f(i)|=1where `i=sqrt(-1)`, then the value of a +b+c+d is

A

`-1`

B

1

C

0

D

can't be determined

Text Solution

Verified by Experts

The correct Answer is:

C

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