用UG3.0可以实现。¯双外摆线b=2.5l=2.5t=1xt=3*b*cos(t*360)+l*cos(3*t*360)yt=3*b*sin(t*360)+l*sin(3*t*360)&m...

6.3符号微积分6.3.1符号序列的求和【*例6.3.1-1】求，symskt;f1=[tk^3];f2=[1/(2*k-1)^2,(-1)^k/k];s1=simple(symsum(f1))%f1...