Let f: R-> be a differentiable function...

Let `f: R->` be a differentiable function `AAx in R` . If the tangent drawn to the curve at any point `x in (a , b)` always lies below the curve, then (a) `f^(prime)(x)<0,f^(x)<0AAx in (a , b)` (b)`f^(prime)(x)>0,f^(x)>0AAx in (a , b)` (c)`f^(prime)(x)>0,f^(x)>0AAx in (a , b)` (d)`non eoft h e s e`

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Let `f: R->` be a differentiable function `AAx in R` . If the tangent drawn to the curve at any point `x in (a , b)` always lies below the curve, then (a) `f^(prime)(x)<0,f^(x)<0AAx in (a , b)` (b)`f^(prime)(x)>0,f^(x)>0AAx in (a , b)` (c)`f^(prime)(x)>0,f^(x)>0AAx in (a , b)` (d)`non eoft h e s e`

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