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Lert f:[a , b]vec be a function such th...

Lert `f:[a , b]vec` be a function such that for `c in (a , b),f^(prime)(c)=f^(c)=f^(c)=f^(i v)(c)=f^v(c)=0.` Then `f` (a)has a local extermum at `x=cdot` `f` (b)has neither local maximum nor minimum at `x=c` `f` (c)is necessarily a constant function (d)it is difficult to say whether `a)or(b)dot`

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