A) 100 cm
B) \[-100cm\]
C) \[-1\,cm\]
D) \[-\frac{100}{9}\,cm\]
Correct Answer: B
Solution :
Power of combination \[P={{P}_{1}}+{{P}_{2}}\] \[\Rightarrow \] \[4+5+{{P}_{2}};{{P}_{2}}=4-5=-1\,D\] \[\therefore \] \[-1={{P}_{2}}=\frac{100}{f(cm)}\Rightarrow f=-100\,cm\]You need to login to perform this action.
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