an = 2+3(n-1)=3n -1
bn = -2 +4(n-1)=4n-6
3n-1 =4n-6
n=5
如题.{an}是首项为2,公差d1为3的等差数列,{bn}是首项为-2的,公差d2为4.若an=bn,求n
如题.{an}是首项为2,公差d1为3的等差数列,{bn}是首项为-2的,公差d2为4.若an=bn,求n
数学人气:996 ℃时间:2019-10-17 14:09:00
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