A girl enrolling in typing class type 60(x+1)/x+9 words per minute after x weeks of lesson. Determine the maximum possible number of words the girl can type as time passes

Answer 1

intuitively , as x ---> ∞
(x+1)/(x+9) ---> 1

so lim 60(x+1)/(x+9) , as x --> ∞
= 60