A) 2
B) 3
C) 4
D) 8
Correct Answer: C
Solution :
\[\frac{2}{x}+\frac{3}{y}=\frac{9}{xy},\]multiply both sides by xy \[2y+3x=9\] ??(i) \[\frac{4}{x}+\frac{9}{y}=\frac{21}{xy}\Rightarrow 4y+9x=21\] .?..(ii) Solving equation (i) and (ii)- \[x=1,\,y=3\Rightarrow x+y=1+3=\]You need to login to perform this action.
You will be redirected in
3 sec