Just as the value of a telephone network increases with each new phone ______ to the system, so does the value of a computer system increase with each program turned out.
【简答题】已知点P在曲线C: y= 1 x (x>1) 上,曲线C在点P处的切线与函数y=kx(k>0)的图象交于点A,与x轴交于点B,设点P的横坐标为t,点A、B的横坐标分别为x A 、x B ,记f(t)=x A ?x B . (1)求f(t)的解析式; (2)设数列{a n }满足 a 1 =1, a n =f( a n-1 ) (n≥2 且 x∈ N * ) ,求数列{a n }的通项公式; (3)...