minimum value of function The minimum value of f(x)=x^8+x^6x^42x^3x^22x+9 is: a 5 b)1 c)0 d)9 
Re: minimum value of function If im not misunderstanding you, then the answer is d) , 9 
Re: minimum value of function The derivative of f equated to zero has only 1 real root, which is . meaning there is a minimum there and since f has an even order, we know this is a global minimum. 
Re: minimum value of function Quote:

Re: minimum value of function I used the rational roots theorem, and checked, using polynomial division to find: I then found numerically that the remaining 6th order factor has a global minimum greater than zero, hence it has no real roots. 
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