如何解2t^3-3at^2+a^3=0

如何解2t^3-3at^2+a^3=0 a+c=4t,a+c=5t,a+b=6t,如何解这个方程a=7/2t,b=5/2t,c=3/2t 一元三次方程如何求解?例如像-t^3+17t^2-88t+144=0如何解? 怎么解?（1）at^2+8t+8=0,a-8求t最大值 高等数学题,我知道怎么列式子,但是不知道怎么解了.请重点在于解出答案.曲线x=at,y=a/2 t^2,z=a/3 t^3 (a>0,0 物体加速度随时间变化a(t)=At-Bt^2,A=1.5m/s^3,B=0.120m/s^4,v(t)=∫a(t)dt+C中∫a(t)dt该怎么计算? (1-t)^3=1-3t+3t^2-t^3?如何化简得 4+(t-1)×(-2)-3t=-1,如何计算? 3t^2-1=(a^3-a-t^3+t)/(a-t) t∈[1,2]at²-t+2=0求a的取值 我做题就是坐不对,一看答案就恍然大悟,要不就是答案也看不懂.顺便请大家帮忙给我说说这个问题,我看不懂额证明：S1=v0T+aT^2/2S2=v0(2T)+a(2T)^2/2-v0T-aT^2/2=S1+aT²S3=v0(3T)+a(3T)^2/2-v0(2T)-a(2T)^2/2=S2+a 求一道英文数学题的答案If the position of a particle at a time is given by the equation x(t)=2t^3-9t^2+12t-18Find the distance(距离非位移）of the particle from t=0 to t=4. t²-at+a²-3=0在（0,+∞）上有2个不同的根为什么要求满足a²-3＞0 求解一道微积分应用题.At time t>=0 seconds,the position of a body moving along the x-axis is x(t)=t^3-21t^2+144t m.(1)Find the body's speed each time the acceleration is zero.Enter your answer as a list if necessary.(2) Find the total distan 解一元三次不等式如何解2t^3-3t^2+3t-1 10道英语题目,求英语霸霸们解答~1、James is ________ French than Polly.A.a bit better at B.a bit more good at C.a bit good at 2、You ________ it if you don’t have time.A.needn’t to do B.mustn’t do C.don’t have to do 3、Our class 选择：设A为3阶矩阵,|A|=1,则|-2AT|= A:-8 B:-2 C:2 D:8 为什么答案是A,在|-2AT|中,T是转置符号 limx趋近于0 [∫(0到x)t*(e^at-1)dt] / x^3 =2 求a如图