计算 2x^2-(3x-1)(1+3x)+5x(x-1)
题目
计算 2x^2-(3x-1)(1+3x)+5x(x-1)
答案
2x^2-(3x-1)(1+3x)+5x(x-1)
=2x^2-(9x^2-1)+5x^2-5x
=2x^2-9x^2+1+5x^2-5x
=-2x^2-5x+1
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
最新试题
热门考点
- 甲种糖每千克13.5元,乙种糖每千克16.2元,把这两种糖混合后,售价为每千克14.4元,甲、乙2种糖的重量比是______.
- HE PUT HIS HANDS INTO A STREAM AND held some w_____ in his hands to drink.
- 优秀文化对促进人的全面发展有什么作用?
- Miss Zhao was ill,so M.r Zhang took her class i___填空
- The _girl sat in the come,_.
- 列式计算. (1)2/3与4/5的和是哪个数的8/5? (2)12的3/4比一个数的2倍多9/10,这个数是多少?
- 生于忧患死于安乐中的“困于心,衡于虑,而后坐”和“征于色,发予声,而后喻”叙述什么道理
- 圆体积计算公式
- 练习:一、写出下列词的近义词和反义词 1.艰难 2.急促 3.亢奋 4.破旧
- His mother asks him () computer games before he finishes his homework.a.to not play b.not to play