1.数列成等比数列,若第二个数加4就成等差数列,再把这个等差数列的第三项加32又成等比数列,求这三个数.2.若-9,a1,a2,-1成等差数列,-9,b1,b2,b3,-1成等比数列,则b2*(a2-21)等于?
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 10:54:37
![1.数列成等比数列,若第二个数加4就成等差数列,再把这个等差数列的第三项加32又成等比数列,求这三个数.2.若-9,a1,a2,-1成等差数列,-9,b1,b2,b3,-1成等比数列,则b2*(a2-21)等于?](/uploads/image/z/223471-55-1.jpg?t=1.%E6%95%B0%E5%88%97%E6%88%90%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%2C%E8%8B%A5%E7%AC%AC%E4%BA%8C%E4%B8%AA%E6%95%B0%E5%8A%A04%E5%B0%B1%E6%88%90%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%2C%E5%86%8D%E6%8A%8A%E8%BF%99%E4%B8%AA%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%E7%9A%84%E7%AC%AC%E4%B8%89%E9%A1%B9%E5%8A%A032%E5%8F%88%E6%88%90%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%2C%E6%B1%82%E8%BF%99%E4%B8%89%E4%B8%AA%E6%95%B0.2.%E8%8B%A5-9%2Ca1%2Ca2%2C-1%E6%88%90%E7%AD%89%E5%B7%AE%E6%95%B0%E5%88%97%2C-9%2Cb1%2Cb2%2Cb3%2C-1%E6%88%90%E7%AD%89%E6%AF%94%E6%95%B0%E5%88%97%2C%E5%88%99b2%2A%28a2-21%29%E7%AD%89%E4%BA%8E%3F)
xRN19&v{!Mu"@J@QBB?S~Yyf8j6X\${y?5WI&۽2":]7.K[ʅ,ŀTyٸCɟsA
JT!&Y:([3Kx-'X)_PԂТⅆG_*0P\Xٰ375ةu|sIfLǩ(֔]GP*a5t :ĞI׳^7B~LC
]\(<