Question
Mathematics Question on complex numbers
If f(z)=zn+an-1zn-1 +......+a1zn+a0 ∈ R[z] is a polynomial in z with no root over R,then deg(f)is
A
9
B
always≤4
C
an odd number
D
always≥4
E
an even number
Answer
an even number
Explanation
Solution
The correct option is (E): an even number