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I have been trying to solve this problem, is this answer right? it's my first time solving a problem in the curve fitting least-squares that has a finite series in it.

find $a_j$ give m points as $(x_i,y_i)$ where: $i = 1,2,...,m$, $y=\sum_{j=0}^n a_j x^j \quad n < m$. (the problem and answer in the picture)

my solution:

enter image description here

if wrong, what approach should I take to solve it?

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  • $\begingroup$ Please include your work in the body of your question rather than as a link so that this question is self-contained. $\endgroup$ – csch2 May 12 at 19:40
  • $\begingroup$ sorry, it was my first time asking a question here. $\endgroup$ – Kieran Dem May 13 at 0:37

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