A) \[\frac{1}{a}+\frac{1}{b}=2\]
B) \[\frac{1}{a}-\frac{1}{b}=1\]
C) \[\frac{1}{a}-\frac{1}{b}=2\]
D) \[\frac{1}{a}+\frac{1}{b}=1\]
Correct Answer: D
Solution :
(d): \[a\left( b-1 \right)+0\left( 1-0 \right)+1\left( 0-b \right)=0\]; \[\Rightarrow \]\[ab-a+(-b)=0\]; \[\Rightarrow \]\[ab=a+b\]; \[1=\frac{1}{a}+\frac{1}{b}\]You need to login to perform this action.
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