A) 7
B) 3
C) 27
D) None of these
Correct Answer: C
Solution :
\[{{2}^{x}}-{{2}^{x-1}}=4\] or \[{{2}^{x-1}}(2-1)=4\] or \[{{2}^{x-1}}={{2}^{2}}\] or \[x-2\] or \[x=2+1=3\] \[\therefore \] \[{{x}^{x}}={{3}^{3}}=27\]
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