A) 4
B) 5
C) 6
D) 7
Correct Answer: A
Solution :
Given, \[{{3}^{x}}\times 27={{9}^{x\,+\,4}}\] \[\therefore \] \[{{3}^{x}}\times {{3}^{3x}}={{3}^{2(x\,+\,4)}}\] On comparing, \[x+3x=2(x+4)\] \[\Rightarrow \] \[4x-2x=8\] \[\Rightarrow \] \[x=\frac{8}{2}=4\]You need to login to perform this action.
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