数学问题 数列答:(1)解:∵在单调递增数列{a[n]}中,a[2n-1],a[2n],a[2n+1]成等差数列,n=1,2,3,...∴2a[2n]=a[2n-1]+a[2n+1]∵在单调递增数列{a[n]}中,a[2n],a[2n+1],a[2n+2]成等比列,n=1,2,3,...∴a[2n+1]^2=a[2n]a[2n+2]∵a[1]=1,a[2]=2 ∴2a[2]=a[1...
高中数列问题答:(1)解:∵在单调递增数列{a[n]}中,a[2n-1],a[2n],a[2n+1]成等差数列,n=1,2,3,...∴2a[2n]=a[2n-1]+a[2n+1]∵在单调递增数列{a[n]}中,a[2n],a[2n+1],a[2n+2]成等比列,n=1,2,3,...∴a[2n+1]^2=a[2n]a[2n+2]∵a[1]=1,a[2]=2 ∴2a[2]=a[1...