HELP: Integral

BobSun

Limit of an integral
1. Homework Statement
Evaluate:
the limit as n goes to $$\infty$$ of
$$\int^{1}_{0} (n^{3/2}x^{5/4})/(1+n^{2}x^{2})dx$$
dx is the lebesgue measure

2. Homework Equations
I thought I could use the monotone convergence theorem or the dominated convergence theorem neither work.

3. The Attempt at a Solution
the intregrand is dominated by $$1/\sqrt{x}$$ but $$1/\sqrt{x}$$ isn't lebesgue integrable.

Related Calculus and Beyond Homework Help News on Phys.org

HallsofIvy

Homework Helper
?? $1/\sqrt{x}= x^{-1/2}$ surely is Lebesque integrable on [0,1]. In fact, it is Riemann integrable and its integral from 0 to 1 is just $\left 2x^{1/2}\right|_{x=0}^1= 2$.

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving