A) \[(-5,1)\]
B) \[-5\le x\,\,and\,\,x\ge 1\]
C) \[\left( -4,1 \right]\]
D) \[\phi \]
Correct Answer: C
Solution :
[c] \[f(x)=\sqrt{5-4x-{{x}^{2}}}+{{x}^{2}}\log (x+4)\] \[\Rightarrow 5-4x-{{x}^{2}}\ge 0,x+4>0\] \[\Rightarrow (x+5)(x-1)\le 0,x>-4\] \[\Rightarrow -5\le x\le 1,x>-4\Rightarrow -4<x\le 1.\]You need to login to perform this action.
You will be redirected in
3 sec