A) \[I{{F}_{7}}\]
B) \[I_{3}^{-}\]
C) \[I{{F}_{3}}\]
D) \[I{{F}_{5}}\]
Correct Answer: B
Solution :
[b] \[\begin{align} & \underset{\downarrow }{\mathop{I_{3}^{-}}}\, \\ & \begin{matrix} x & \Rightarrow & 3x=-1 \\ {} & {} & x=-\frac{\,1}{3} \\ \end{matrix} \\ \end{align}\]
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