题目

 How could we possibly think that keeping animals in cages in unnatural environments－mostly for entertainment purposes－is fair and respectful?  Zoo officials say they are concerned about animals. However, most zoos remain “collections” of interesting “things” rather than protective habitats (栖息地). Zoos teach people that it is acceptable to keep animals bored, lonely, and far from their natural bones.  Zoos claim to educate people and save endangered species(物种), but visitors leave zoos without having learned anything meaningful about the animals’ natural behav已知等差数列{an}的首项a1=1，公差d＞0，且a2，a5，a14恰好是等比数列{bn}的前3项．（Ⅰ）求数列{an}与{bn}的通项公式；（Ⅱ）若数列{cn}对于任意自然数n均有1cn=(an+3)•log3bn，求数列{cn}的前n项和．