Question

Write the sum using sigma notation 3^2+4^2+5^2+...+10^2

Answer 1

     $\sum\limits_{i=3}^{10}\big i^2$

or:

     $\sum\limits_{i=1}^{8}\left(2+i\right)^2$

or:

    x₁=3, x₂=4, x₃=5, .... x₈=10

    $\sum\limits_{i=1}^{8}\big x_i^2$