A) 0
B) 2
C) 4
D) 6
Correct Answer: C
Solution :
We have, \[{{3}^{(x-y)}}=27\] or \[{{3}^{(x-y)}}={{(3)}^{3}}\] \[\therefore \] \[x-y=3\] ?(i) Also, \[{{3}^{(x+y)}}=243\] or \[{{3}^{(x+y)}}={{(3)}^{5}}\] \[\therefore x+y=5\] ?(ii) On adding (i) and (ii), we get \[2x=8\Rightarrow x=4\]You need to login to perform this action.
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