math limit
posted by Abdela said yimer .
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

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