No, this problem is to find the regular body shape according to the change of graphics, which has nothing to do with quadratic function;

Its solution is usually: first, give the number of special cases, guess the general law, and verify it with any examples;

For example, this question:10th: (10+9+…+2+1)+(9+8+…+2+1) =100;

The nth time: (n+)

n- 1

+…+2+ 1)+(n- 1

+

n-2

+…+2+ 1)=n？