f (x)= {{:(3+|x-k|"," , x le k),(a ^(2) ...

`f (x)= {{:(3+|x-k|"," , x le k),(a ^(2) -2 + ( sin (x -k))/((x-k))"," , x gtk):}` has minimum at `x =k,` then:

`a in R`

`|a|lt2`

`|a|gt2`

`1lt|a|lt2`

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