I have to prove that
limx→∞√xcos(x−x2)x+1=0.
I tried squaring both the denominator and numerator to get rid of √x but then cos becomes cos2 and I do not know how to solve it/simplify it further.
I have also tried to use the squeeze theorem with an=0, and bn=√xcos(x−x2)x+1,
but to no avail. I could not find another function that is greater than bn that has a limit of 0.
Answer
Note that
−√xx+1≤√xcos(x−x2)x+1≤√xx+1
and
√xx+1→0
No comments:
Post a Comment