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[" If "6,8" and "12" are "F" .The and "p...

[" If "6,8" and "12" are "F" .The and "pi" " terms of an "AP" .and "f(x)=nx^(2)+2hx-2m" ."],[f(x)=0" has "-],[[" (A) a root between "0" and "1," (B) both roots imaginary."],[" (C) both roots negative."," (D) both roots greater than "1.]]

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A : The function f(x) =2x^3-3x^2-12x+8 has minimum value R: For the above function f^'(2)=0 and f^' ' (2) gt 0