希捷1T和西数1T 应该选哪个

希捷1T和西数1T 应该选哪个 (t+1)*e^t求导数 答案是e^t+(t+1)e^t what is lily doing?she后面应该写哪个 1 ·watches TV .2.is watching T 应该选哪个?为什么22.We still can’t decide ____with our difficulties she_______ yesterday's test,but she didn't.以下四个选项应该选哪个啊?急. not disturb don't disturb no disturb应该用哪个? 已知{x=3t^2+1,y=t^6+2t^3},求导数 高数求导问题.x=t^2+2t y=ln(1+t).急 haven't和don't have哪个对 y=In(x*√x^2+1）和 g(t)=In t/ t^2 这两个怎么求导数? 质点运动方程X=t*t Y=(t-1)(t-1) 求t时刻的切向加速度和法向加速度 T和F哪个代表对