设an=a1+(n-1)d bn=b1*q^(n-1)
a1=b1 a3=a1+2d=3a1 >a1=d,b1=d
a5=a1+4d=5d=5b1q^4>q^4=1
剩下的应该会了吧
{an}等差数列,{bn}等比数列,公差公比均为d,且a1=b1,a3=3b3,a5=5b5,求{an}和{bn}?
{an}等差数列,{bn}等比数列,公差公比均为d,且a1=b1,a3=3b3,a5=5b5,求{an}和{bn}?
(d>0,d不等于1.)
(d>0,d不等于1.)
数学人气:973 ℃时间:2019-10-25 02:00:24
优质解答
我来回答
类似推荐
猜你喜欢
- 1一个圆形水池,要在它的周围铺一条宽1米的小路.小路的面积是多少平方米?
- 2求一道数学题.圆锥体和圆柱组成一个零件.圆锥高是圆柱的2倍,圆锥体积9.42立方厘米,求零件重量.
- 3初三数学若正比例函数y=2kx与反比例函数y=k/x(k不等于0)的图像交与点A(m,1).则k的值.
- 4You shouldd (write him a letter).对划线部分提问
- 5问一下关于热值计算热量的公式问题
- 6小红做了46个红花,比小花多做9个,问小花做了几个 怎样分析题目?
- 7The highest buioldings in the city is located on a beautiful lake,----------of my school.
- 8已知大写字母“A”的十六进制ASCⅡ码值为41,则大写字母“X”的十六进制ASCⅡ码值是( )
- 9the students in japan often take the subway to school改同意句
- 10I'm afraid ______ (lose) my key.I can't find it now