摘要:
(1) >> syms t alpha a beta theta; >> fa=sin(alpha*t)/t; >> fb=t^5*sin(alpha*t); >> fc=t^6*exp(alpha*t); >> fd=t^6*exp(alpha*t); >> fe=5*exp(-a*t)+t^4* 阅读全文
摘要:
(1) >> diag(sym('a%d',[1,12])) (2) >> A=eye(4),B=diag([1,2,3,4]) >> A=sym(A); >> A*B,B*A (3) J1=-5*eye(5)+diag(ones(4,1),1) (4) while(1),A=randi([0,1] 阅读全文
摘要:
(1)求极限 $$ \lim_{x\rightarrow \infty} (3x+9x){1/x}, \lim_{x\rightarrow\infty}\frac{(x+2){x+2}(x+3){x+3}}{(x+5){2x+5}}, \lim_{x \rightarrow a}{\left(\fr 阅读全文