#include using namespace std; class point{ public: double x; double y; point(double x,double y){ this-x = x; th_牛客网_牛客在手,offer不愁
elif type==2 : xum += T[j][1] else: print("数据读取错误!") x = Location[i][2] y = Location[i][3] x = x*sum y = y*sum x1 = x*cos(xum)-y*sin(xum) y1 = x*sin(xum)+y*cos(xum) out.append(x1) out.append(y1) print(out[0], out[1])...
先应用乘法的求导公式:(x1⋅(x1⋅x2))′=x1′(x1⋅x2)+x1(x1⋅x2)′;再应用常数与变量相乘的求导公式,得到 x1′⋅x1⋅x2+x1⋅x2⋅x1′;最后应用公式 x′=1 得到 1⋅x1⋅x2+x1⋅x2⋅1。整理得 ∂u∂x1=2x2⋅x1。再代入 (1,2) 得到 ∂u∂x1(1,2)=4。 常见...
#include using namespace std; class point{ public: double x; double y; point(double x,double y){ this-x = x; th_牛客网_牛客在手,offer不愁