A) \[0\le x\le 10\]
B) \[0<x<10\]
C) \[-10<x<0\]
D) \[x>10\]
Correct Answer: B
Solution :
\[5=\frac{x}{1-r}\] \[\Rightarrow \] \[5-5r=x\] \[\Rightarrow \] \[r=1-\frac{x}{5}\] As \[|r|\,<\,1\] i.e., \[\left| \,1-\frac{x}{5}\, \right|<1\] \[-1<1-\frac{x}{5}<1\] \[-5<5-x<5=-10<-x<0=10>x>0\] i.e, \[0<x<10\].You need to login to perform this action.
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