QuestionWrite the expression $x_{1}^{2} f\left(x_{1}\right)+x_{2}^{2} f\left(x_{2}\right)+x_{3}^{2} f\left(x_{3}\right)+x_{4}^{2} f\left(x_{4}\right)+x_{5}^{2} f\left(x_{5}\right)$ in summation notation. Choose the correct option.

Studdy Solution
Therefore, the given expression can be written in summation notation as $\sum_{i=1}^{5} x_{i}^{2} f\left(x_{i}\right)$ So, the correct answer is option b. $\sum_{i=1}^{5} x_{i}^{2} f\left(x_{i}\right)$ .

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