表达式1: "z" equals "e" Superscript, negative 1 quarter "r" squared , Baseline left parenthesis, 2sin pi "r" minus "r" cos 3 theta , right parenthesisz=e−14r22sinπr−rcos3θ
00
定义域r最小值：
less than or equal to "r" less than or equal to≤r≤
定义域r最大值： 44
00
定义域\theta最小值：
less than or equal to theta less than or equal to≤θ≤
