\frac 1 ( b %2B x ) = \frac 1 a %2B \frac 1 b – InterviewSolution

1.	\frac 1 ( b %2B x ) = \frac 1 a %2B \frac 1 b %2B \frac 1 x , [ a \neq 0 , b \neq 0 , x \neq 0 , x \neq - ( a %2B b ) ]
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