A) \[\{x:x>0\}\]
B) \[\{x:x<0\}\]
C) \[\{x:x>1\}\]
D) \[\{x:x<1\}\]
Correct Answer: B
Solution :
\[f'(x)=a\,\,({{e}^{ax}}-{{e}^{-\,ax}})<0\]\[\Rightarrow {{e}^{ax}}>{{e}^{-\,ax}}\]\[(\because a<0)\] \[\Rightarrow x<0\]You need to login to perform this action.
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