The least integer a, for which \[1+{{\log }_{5}}({{x}^{2}}+1)\le lo{{g}_{5}}(a{{x}^{2}}+4x+a)\] is true for all \[x\in R\] is

The least integer a, for which \[1+{{\log }_{5}}({{x}^{2}}+1)\le lo{{g

1.	The least integer a, for which \[1+{{\log }_{5}}({{x}^{2}}+1)\le lo{{g}_{5}}(a{{x}^{2}}+4x+a)\] is true for all \[x\in R\] is
A.	6
B.	7
C.	10
D.	1
Answer» C. 10

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The least integer a, for which \[1+{{\log }_{5}}({{x}^{2}}+1)\le lo{{g}_{5}}(a{{x}^{2}}+4x+a)\] is true for all \[x\in R\] is

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