A) \[b>0,\text{ }a<0,\text{ }c>0\]
B) \[b<0,\text{ }a>0,\text{ }c>0\]
C) \[b>0,\text{ }a>0,\text{ }c>0\]
D) \[b>0,\text{ }a>0,\text{ }c<0\]
Correct Answer: B
Solution :
If \[{{b}^{2}}-4ac\ge 0,\] then the equation \[a{{x}^{4}}+b{{x}^{2}}+c=0\] has all roots real, if \[b<0,\]\[a>0,\]\[c>0\]You need to login to perform this action.
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