t="60,105,102,114,97,109,101,32,104,101,105,103,104,116,61,4

-(t²-t)+1为什么等于-t²+t-1/4+1+1/4=-(t²-t)+1 已知｛x=3t^4+6t,y=t^3-3t｝ 求导数 h(t)=5t^3+30t^2+45t+4 解方程：t²+（2-t）²=t²+4t+8-2×（16t+12t²+4t的三次方 （t+3t²-3）-（-t+4t²）,其中t=-1,怎么化简,怎么求值? 已知y'''(t)+4y''(t)+6y'(t)+2y(t)=f''(t)-f(t)用MATLAB如何求频率响应H(jw 长度M=（身高T-105）*0.618/3.14 (厘米). 求摆动数列的通项公式数列：a1=t,a2=2t,a3=3t,a4=2t,a5=3t,a6=4t,a7=3t,a8=4t, 摆动数列的通项公式数列：a1=t,a2=2t,a3=3t,a4=2t,a5=3t,a6=4t,a7=3t,a8=4t,a 求导f(x)=(t²+1)² / 4t 解方程：4：5t=2:(3t-1) 3t²-4t-5=0