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please answer it completely Q4: Employ the following methods to find the minimum of the following function: f(x)=x4+2x3+8x2+5x (a) Golden-section search for two iterations, start

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Q4: Employ the following methods to find the minimum of the following function: f(x)=x4+2x3+8x2+5x (a) Golden-section search for two iterations, start with xl=2 and xu=1. (b) Parabolic interpolation, start with x1=2,x2=1,x3=1 for two iterations. (c) Use the Matlab function "fminbnd" in the interval [2,1]. Also calculate the relative approximate errors in (a) and (b)

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