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Let f(x)=a x^2-b|x|, where aa n db are c...

Let `f(x)=a x^2-b|x|,` where `aa n db` are constants. Then at `x=0,f(x)` has a maxima whenever `a >0,b >0` a maxima whenever `a >0,b<0` minima whenever `a >0,b<0` neither a maxima nor a minima whenever `a >0, b<0`

A

a maxima whenever `agt0,bgt0`

B

a maxima whenever `a gt 0, blt 0`

C

minima whenever `a gt 0, blt 0`

D

neither a maxima nor a minima whenver `agt 0, blt0`

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