The LaTeX is the same in both sections. The only difference is that the first section uses the (proper) LaTeX delimiters `\( & \)` for inline and `\[ & \]` for display while the second uses the primitive TeX delimiters `$ & $$`. See https://tex.stackexchange.com/questions/503/why-is-preferable-to for more

Question 4.31 from the text for Fall 2019 semester of CUNY MSDS DT 606

CUNY SPS MSDS Summer Bridge program HomeWork 4