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If f(x)<0,\ x in (a , b) then at the...

If `f(x)<0,\ x in (a , b)` then at the point `C(c ,\ f(c))` on `y=f(x)` for which`F(c)` is a maximum, `f^(prime)(c)` is given by a.`f^(prime)(c)=(f(b)-f(a))/(b-1)` b. `\ f^(prime)(c)=(f(b)-f(a))/(a-b)` c.`f^(prime)(c)=(2(f(b)-f(a)))/(b-a)` d. `f^(prime)(c)=0`

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