solve('arccos(1-x^2/2738)/(2*pi)*3.1415926*37^2-((74+x)/2*(74-x)/2*x^2/4)^(1/2)=430.1','x')
警告: Support of strings that are not valid variable names or define a number will be removed in a future release. To create symbolic
expressions, first create symbolic variables and then use operations on them.?
> In sym>convertExpression (line 1536)
??In sym>convertChar (line 1441)
??In sym>tomupad (line 1198)
??In sym (line 177)
??In solve>getEqns (line 405)
??In solve (line 225)?
错误使用 symengine
Character '(' is invalid.
出错 sym>convertExpression (line 1543)
s = mupadmex({x});
出错 sym>convertChar (line 1441)
? ? s = convertExpression(x);
solve('arccos(1-x^2/2738)/(2*pi)*3.1415926*37^2-((74+x)/2*(74-x)/2*x^2/4)^(1/2)=430.1','x')
警告: Support of strings that are not valid variable names or define a number will be removed in a future release. To create symbolic
expressions, first create symbolic variables and then use operations on them.?
> In sym>convertExpression (line 1536)
??In sym>convertChar (line 1441)
??In sym>tomupad (line 1198)
??In sym (line 177)
??In solve>getEqns (line 405)
??In solve (line 225)?
错误使用 symengine
Character '(' is invalid.
出错 sym>convertExpression (line 1543)
s = mupadmex({x});
出错 sym>convertChar (line 1441)
? ? s = convertExpression(x);
出错 sym>tomupad (line 1198)
? ?? ???S = convertChar(x);
出错 sym (line 177)
? ?? ?? ?? ?? ? S.s = tomupad(x);
出错 solve>getEqns (line 405)
? ?? ???a = sym(a);
出错 solve (line 225)
,
先做图,看看跟x轴有多少个交点,以及交点的位置
然后用牛顿迭代法一个个求数值解