# Thread: Real Analysis: Let f(x)=x^3+2x on [1,4]. Let epsilon = 0.05....

1. ## Real Analysis: Let f(x)=x^3+2x on [1,4]. Let epsilon = 0.05....

Let f(x)=x^3+2x on [1,4]. Let epsilon = 0.05. Find a partition P(epsilon), such that U(P(epsilon),f)-L(P(epsilon),f)<epsilon

2. Originally Posted by aris3
Let f(x)=x^3+2x on [1,4]. Let epsilon = 0.05. Find a partition P(epsilon), such that U(P(epsilon),f)-L(P(epsilon),f)<epsilon
What are your thoughts? What have you tried? How far have you gotten? Where are you stuck?