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- 1设an为等差数列,bn为等比数列,且a1=0,若cn=an+bn,且c1=1,c2=1,c3=2. (1)求an的公差d和bn的公比q; (2)求数列cn的前10项和.
- 2左边日字旁,右边一个‘汤’的右半边,这是什么字,读什么.
- 3计算4x^2-[2x-(x^2-2x+3)-2(x^2-3x)]
- 4He transplanted the little tree to the garden ____it was the best time for it.
- 5英语翻译
- 6蒸馏时温度计的作用,以及摆放的位置的原因?
- 7点a在数轴上表示的数是1,a×b两点之间的距离为ab的绝对值且ab的绝对值是2,那么点b表示的数为
- 8中国人名字的英语写法?
- 9I have no idea that you were here.和I had no idea that you are here有甚么区别?
- 10求未知数x 3x-2×4分之3=2.1