Question

方程求解

y=-2n^2+16n+3求n ,y=-n^2+7n-50,求n

Answer 1

应该这样求解。
>> solve('0.5090*cos(x)-2.2037/2*cos(2*x)+0.7701/3*cos(3*x)+2.8578*x=140','x')
ans =
48.601630498913321372143520942666
>> solve('0.5090*sin(x)*x-2.2037*sin(2*x)*x+0.7701*sin(3*x)*x+3.5112*x=140','x')
ans =
39.336933473397227373741730597253
希望能解决您的问题。