1.What is the next term in the geometric sequence 16,–4,1,– 1/4,…
问题描述：
1.What is the next term in the geometric sequence 16,–4,1,– 1/4,…
答
1/16
because 16÷（-4）=-4
-4 ÷（-4）=1
1 ÷（-4)=-1/4
so, -1/4 ÷（-4)=1/16