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if b^(2)ge4ac for the equation ax^(4)+b...

if `b^(2)ge4`ac for the equation `ax^(4)+bx^(2) +c=0` then roots of the equation will be real if

A

`bgt0,alt0,cgt0`

B

`blt0,agt0,cgt0`

C

`bgt0,agt0,cgt0`

D

`bgt0,alt0,clt0`.

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A DAS GUPTA-Equations, Inequation and Expressions-Exercise
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  9. The expression a^2x^2+bx+1 will be positive for all x in R if

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  10. If x ,y ,a n dz are real and different and u=x^2+4y^2+9z^2-6y z-3z x-2...

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  14. If a+b+c=0, then, the equation 3ax^(2)+2bx+c=0 has , in the interval ...

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  15. If the value of ax^2+bx+c is always an integer for integral values of ...

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