∵{an}为等差数列,公差为d
∴an=a1+(n-1)d
∴C^an=C^[a1+(n-1)d]
∴C^an/C^a(n-1)=C^[a1+(n-1)d]/C^[a1+(n-2)d]=C^d 为定值,
又∵C^a1≠0,
∴{C^an}(c不等于0)为等比数列,公比为q=C^d.
∵{an}为等差数列,公差为d
∴an=a1+(n-1)d
∴C^an=C^[a1+(n-1)d]
∴C^an/C^a(n-1)=C^[a1+(n-1)d]/C^[a1+(n-2)d]=C^d 为定值,
又∵C^a1≠0,
∴{C^an}(c不等于0)为等比数列,公比为q=C^d.