How to find maxima or minima for this function $F$
$F=\sum\limits_{i=1}^n 5x_{i}^{3}+2x_{i}+6$
If it is possible to find maxima or minima for this function, what is the double derivative of the function else why not possible to find the derivative
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Is $f$ a function of several variables, i.e. $f(x_1,\cdots, x_n)$. If not, where is $x$ on the $R.H.S$. Would you please explain what is the relation between $x$ and $x_i$s. – Ramasamy Kandasamy Aug 26 '20 at 13:09
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I think now the question is meaningful – SS Varshini Aug 26 '20 at 13:51
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Assuming $n$ to be varying, the sum goes to $\infty$ when $n \to \infty$. Minima occurs at $n=1$ – DatBoi Aug 26 '20 at 14:59
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what if n can never be infinity, n interval is [5,100] – SS Varshini Aug 26 '20 at 15:24