3t²+12t-2=0
解方程﹣3t²-2t+4=0,用因式分解法,
2t²+3t²-(3t²+5t-t²)
解方程t(t-2)-3t =0
(t+3t²-3)-(-t+4t²)
计算 (t+2)(t²-t+1)+t-2
解方程:t²+(2-t)²=t²+4t+8-2×(16t+12t²+4t的三次方
一个MATLAB题 画出Y(T)=-3T^2+5 T>=0;3T^2+5 T
2t+1/2×0.01×t²=3t经过哪几步化为0.01t²-2t=0?
参考身高: 2T 3T 4T 5T 6T 8T是什么意思
应该用不到题目吧令x+1=t,x=t-1∴f(t)=,(t-1)=t²-2t+1即f(x)=x²-2
求极限lim(t-sint)/t^3 (t趋近0) =limt/t^3-limsint/t^3=lim1/t^2-lim
已知二次函数f(x)在x=0.5(t+2)处取得最小值-0.25t×t (t≠0)且f(1)=0