A) -1
B) 1
C) 2
D) -2
Correct Answer: A
Solution :
According to condition \[\frac{{{\alpha }^{2}}+1}{2}=-\alpha \] Þ \[{{\alpha }^{2}}+2\alpha +1=0\Rightarrow \alpha =-1,-1\].You need to login to perform this action.
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